September 23rd has been recognized as Celebrate Bisexuality since 1999. To commemorate the event's 15th anniversary, GLAAD, BiNet USA and other bisexual organizations have gotten together to launch an extended, week long celebration-- Bisexuality Awareness Week!  In light of the occasion, we thought we'd honor our bisexual brothers by making a list of our favorite male switch hitters ever. It was hard narrowing this down to just ten, so if there's someone you particularly admire who wasn't included here, please be sure and mention them in the comments.

1. Michael Stipe

Michael Stipe officially came forward about his sexuality in 1994, when he described himself as "an equal opportunity lech." Stipe has said he doesn't define himself as gay, straight, or bisexual, but that he was attracted to and had relationships with both men and women.

2. Alexander the Great

Alexander III of Macedon lived from 356–323 BC. He might have married Roxanne and fathered a child with her, but his greatest relationship was with lifelong friend Hephaestion, and towards the end of his life he fell madly in love with a eunuch named Bagoas.

3. Alan Cumming

Alan Cumming was married to Hilary Lyon from 1985 to 1993. He was married in a civil ceremony in 2007 to graphic artist Grant Shaffer. Oasis magazine once asked Cumming why he preffered "bisexual" over other possible labels such as gay, straight, or pansexual. Here's his reply:

"I just think I haven't closed myself off and I never close myself off to the possibility of experience and the possibility of attraction. So, even now that I have a husband, who's a man (laughs), I still find lots of people attractive. Some of them are women. I've just never understood ... well, I can understand, but I don't agree with gay men who are completely horrified by a woman, or the idea of sex with a woman, or the idea of a woman's genitals. That's just not been me. In a way, I think it's wrong to close your mind off."

4. Ryan Buell

For Ryan Buell, being bisexual is not just a natural state, it's also a paranormal one. The 34-year old former host of Paranormal State, which ran for five seasons on A&E (2007-2011) revealed he was bisexual in his 2010 memoir. Paranormal State: My Journey into the Unknown. Buell felt he had to speak out on the subject because of his prominence in the male-dominated paranormal research field, and his deeply held religious beliefs. He felt he could open some eyes about the issue of bisexuality.

We interviewed Ryan Buell back in 2010 and that feature, surprisingly, became one of our biggest of the year. In the piece, Buell described receiving a heartbreaking letter from a gay fan who worried he was going to hell. The fan asked Buell if he'd ever come across any gay ghosts who said they weren't able to go to Heaven because of their sexuality.

"He was essentially looking for proof that during my investigations that some spirits are Earth-bound and can’t go to Heaven because they’re gay. That really just broke my heart because here was this guy who thinks he’s sick, who thinks God is going to send him to Hell for who he is.

That’s why I came out. I don’t think I’m going to Hell. I wrote in the book, too, that we don’t need to change for religion. Religion needs to change for us. Homosexuality and bisexuality are not a sin. Who wants to wake up and be beaten up or be called names? I’m so tired of seeing kids who commit suicide on the news. I’m a private person. I didn’t want to come out."

Sadly, Buell was diagnosed with pancreatic cancer in 2012 and had to cancel a lecture tour this summer because of health problems. We wish him the best.

5. Jai Rodriguez

Queer Eye's culture guy spoke with AfterElton.com back in 2006 and here's what he had to say about his orientation...

AfterElton: Is the fact you identify as bisexual ever an issue for fans? Are you still bi?

Jai Rodriguez: Hmmm… I consider myself gay because at the end of the night, that's who I want to cuddle with. But when I go out, I go to straight clubs. And occasionally in Page 6 they will report some lady fun I've had. But, I have no apologies. Yes, I've had sex with a woman. Will I be straight? Never going to happen. I'm sure it's an issue for some gays, but it's who I am.

6. Billie Joe Armstrong

Armstrong identified himself as bisexual in a 1995 interview with The Advocate:

"I think I've always been bisexual. I mean, it's something that I've always been interested in. I think people are born bisexual, and it's just that our parents and society kind of veer us off into this feeling of 'Oh, I can't.' They say it's taboo. It's ingrained in our heads that it's bad, when it's not bad at all. It's a very beautiful thing."

7. Brad Davis

Davis sadly died in 1991 from an intentional drug overdose after a six year battle with AIDS. He left behind a wife and daughter, though Boze Hadleigh's book Hollywood Gays includes an interview with Davis in which he acknowledges having had sex with men. When asked if he considered himself bisexual, he replied "didn't someone once say that everyone's bisexual, deep down?"

8.  Gregg Araki

Araki self-identified as gay until 1997, when he began a two-year relationship with actress Kathleen Robertson. Bisexuality is a theme in many of his films.

9.  Leonard Bernstein

The celebrated composer and conductor was reportedly bisexual during his early years in New York. He married in 1951 (on the advice of a mentor who felt it would enhance his professional prospects.)

10. Mike Manning

The Real World: DC housemate made big waves when he announced to the world that he was bisexual on the MTV series. Since then the handsome 24-year old has been a role model on all levels. He has had a number of acting roles, most recently in the Disney Channel original movie Cloud 9, but he's made an even bigger splash as a producer (he was one of the names behind the documentary Kidnapped for Christ.)

We did an interview and photoshoot with Manning last year. At the time, we asked him if he took flak for dating both men and women. Manning admitted that he did, but he'd learned to ignore it. "I think the LGBT community knows what it feels like to be discriminated against because of who you love, so I think that’s a huge form of hypocrisy if they’re going to judge me. And then the straight community, I decided a long time ago that I don’t care what the straight community thinks about my love life and so I’m just going to stick with that."

So that's our list of favorite bisexual men. Who would be on your list?

*An earlier version of this feature ran in September 2009