I have watched loads of heteoesxual porn but not shemale porn, I am interested where you going with this point?
Well, if you find a shemale arousing, then it suggests that you would be willing to sleep with anyone as long as they are attractive enough, regardless of which sexual organ is between their legs
Guys who identify as "straight" sometimes watch shemale porn, which kind of supports the Kinsey Scale theory, in that they're a little flexible.
It has been mathematically proven that watching shemale porn is less gay than watching straight porn. Straight sex always has at least one guy in it. Meaning you're a guy watching a guy having sex which is kinda gay. Shemale sex has at least one shemale in it and only bottom half of shemales is guy parts. Meaning it's half as gay to watch shemale porn as it to watch straight porn.
Math never lies.