That just a really good question!
And of course that means I don't have a very good answer.
For the most part I am about as hetero as you can get. I have tested the waters in the past and it's just really not for me, with one exception, for a brief period. There was this pre-op transexual in NYC, and I'll tell you this much, "she" was hot, we both played at top and bottom and we had a ball.