I don't so, I think rubntug has hit the nail on the head with this one!
His post sums it up perfectly:
So a gay may not have had any sexual contact with a male and yet still be gay cos he has an emotional attraction to men.
And a straight may have indulged in all manner of "gay" sexual activities either by trickey, force, or drunkeness and still be straight!
So to all those blokes out there that have DFKed, been blown by, and fucked some ladyboys up the arse you don't have to worry.
Also to those who are into DD from a woman you are ok as well.
So now class consider the following scenario, is the guy gay or straight:
A guy is being dominated by his dominatrix and she is letting him suck her strap on cock. Once she is satisfied with his sucking she presses the cum button and releases fake cum into his mouth.
Gay or straight ?