Well to be fair, some gay men would love to be straight.
Thus, the only way for a gay man to become "pseudo" straight, might be to transform their body into a woman's, thus being able to date men and have 'normal' heterosexual lives. I don't think this is often the case, but there may exist some cases. Again, this is not that common. The issue with this is, a transformation isn't done overnight or after one operation. I don't see many gay men who identify as male going through such an extensive process, for a mere chance at becoming a passable woman. Additionally, this may be a reason why some transgender people identify as gay. The surgeries and therapies in order to transform into the other gender might be too costly, thus, the individuals might go for the next best option, to live their lives as a gay male. If these surgeries and therapies were always successful at very affordable prices, we may find that many more people would identify as transgender for either reason listed above.
I feel like I have gone WAY off topic. But, their is much more complexities to these issues than one might think. There are limited choices available as well as lifestyle or occupational motivations of gay men that identify as gay men and dress in drag. Often transvestite and transgender are treated interchangeably. Further some gay men are feminine, some masculine, and many gradients in-between. A person's reasoning to transform might not be so clear-cut depending on where a person falls on the gradation of male and female. One person who transforms might feel like they are completely one gender, while the other may feel like they fall in-between somewhere, but closer to the opposite sex. In these cases, one might speculate that a person is choosing to be transgender. Some of us are not lucky enough to have distinct gender identification. I am glad that I do, but I am not going to assume other people must also have a definitive gender identification.
Though, yes, there exists that typical example of girl-on-girl college experimentation or gay men that falsely identify as bisexual in order to feel more masculine and less ashamed of their sexuality. We should always give those with gender and sexual identity different from ours a benefit of a doubt. In that, they are not acting out or choosing a divergent identity on a whim. There are many different sexualities and gender identifications from our own. Though, it may seem impossible that anyone could ever have a genetic disposition different from ours among those born into the same physical sex, it may not be true that each person will share those innate qualities.
So sorry for being off topic, I just wanted to get the point across to anyone whom assumes that most or any people with deviating sexualities or gender identities from the norm are choosing to do so or socialized behavior in some way when the american psychological association and other reputable health organizations have concurred that these qualities are either genetic, occur during the fetal development, and/or a culmination of both. Either way, an innate quality. Now, with those qualities there is room for choice, but these are choices that are simply reflecting their innate affinity. For instance, heterosexual men choose to date women. There is choice involved with all humans sexual behavior, but it is simply a manifestation of their innate sexual preferences. For some the choices seem more clear and especially those that align with widespread social customs. For those with more complex innate preferences, it is more difficult to make choices that align with those preferences, so we shouldn't assume since more contemplation is required that somehow the decisions are an act or against one's innate qualities.
Lastly, there are MANY valid reasons to date or not date a transgender person. Factoring in the person's choosing to change gender is not a valid one and doesn't have a place in this discussion.