Around 80% of guys who visit tgirls are straight. So it said on a medical website I looked at yesterday.
I'm heterosexual, but admit to being curious about transsexual girls, though I haven't done one. Yet.
10 years ago I was horrified at the thought of a T-girl.
I had even accidentally visited a few in Amsterdam and Antwerp, and ran a mile when I found out.
Then a couple of things happened:
1. A non-working girl I was seeing who had a large clit, used to joke that she'd had a sex change.
2. I was getting more and more into strapon play and started fantasizing about a girl's clit getting excited and large enough to shag me with her built-in strapon
Then I realised that's what a T-girl is, and gave it a go.
I have since read up on it, and apparently the penis and clitoris are the same organ, but one develops outside the body, and one remains buried under skin.