But if your theory is for gay men, shouldn't it work for straight men too?   Maybe a straight man who tries cock for a while?  Is he still straight?  If he eventually goes back to pussy, was he ever truly gay then? 
That's why I'm such a big fan of sexual fluidity.  Back and forth depending on how the situation or environment dictates.  Of course that throws mud on the whole genetic theory.
		
		
	 
Why would that have any negative impact on the theory that proposes that there is a genetic origin for sexuality? Some people are born gay, some others are heterosexual and yet, some others are bisexual and their preference might fluctuate one, or many times throughout their lives. I could also be that it will never fluctuate at all.
The reason why so many in the gay community feel threatened by the idea of 
some self-identified gay men discovering, or finally accepting that they are indeed bisexual, is because they fear that society will try to impose a false notion of potential heterosexuality on them. However, this isn't the case for the majority. The people in this thread are clearly bisexual, or are fetishizing a very particular type of bisexuality that isn't true for everyone - not even all bisexual people have the proverbial "fluidity" that is so often discussed. This is a relatively limited phenomenon, and maybe it would be more responsible to call it "cyclical" or "periodical" bisexuality in those cases in which desire changes completely over a relatively lengthy period of time. Moreover, I think that the pleasure expressed in the idea of deceiving, exploiting and manipulating others while secretly transitioning into "heterosexuality", could make some react rather negatively. While there is nothing abnormal about erotizing certain aspects of a person's sexuality, I find it curious that many of the people who have posted in this thread are excited by the idea of men lying to and emotionally abusing their partners. 
That's why I would be interested in knowing the underlying phenomena that "trigger" these behaviours and fantasies, and what leads these people to still self-identify as "gay" and then "straight", when clearly they are neither thing: they are bisexual. How we choose to identify ourselves is irrelevant when our behaviours do not match the label we are choosing to use. Finally, just to clarify:
	
	
		
		
			Alternating Bisexuals – one relationship at a time, the first might be exclusively straight, the next exclusively gay and vice versa. Alternating Bisexuals are usually monogamous.
Circumstantial Bisexuals – primarily heterosexual but bisexual because of circumstances, eg; Prison where there are no women/men available.
Concurrent relationship Bisexuals – have a primary relationship with one gender, but may have multiple casual relationships with partners of the other gender.
Conditional Bisexuals – will switch sexuality for personal gain, eg: Gay for Pay.
Emotional Bisexuals – have intimate emotional relationships with both genders but only have sex with one gender.
Integrated Bisexuals – have two or more concurrent primary relationships one with a man one with a woman
Exploratory Bisexuals – testing the water seeing if they like it.
Hedonistic Bisexuals -primarily straight or gay/lesbian but will switch purely for sexual pleasure.
Recreational Bisexuals – bi only when drunk or high. “Party Bisexual”
Isolated Bisexuals – currently straight or gay/lesbian – but has had one off sexual encounter in the past which qualifies them as bisexual.
Latent Bisexuals – has strong yet so far unsatisfied urges to go the other way.
Motivational Bisexuals – will go bi to satisfy a partner, e.g. straight women agreeing to MFF threesome.
Transitional Bisexuals – the only type of bisexuality the gay community understands, the one “going through a phrase”.
		
		
	 
http://www.twodaymag.com/love/view/the-13-forms-of-bisexuality/
While I think that the above list is far too simplistic and, in some cases, inadequate (it reflects isolated behaviours rather than giving a full emotional and psychological explanation for some of these these types of bisexuality), it can explain what is seen in here - the idealization of Transitional, Recreational and Latent bisexuality as a reflection of cyclicality, or semi-permanent fluidity.
I don't know what other people think, but I would think that this explains it quite well. I also agree with Level 27, even though his support for the absolutely repugnant Outstraight and its rabid homophobes with their "gay people are not evolved/emotionally healthy/biologically functional enough to be heterosexual", is a bit questionable. Well, that was just my little contribution to this debate. I hope that I haven't offended anyone.