While something like that does sound sexy - at least the submission aspect does anyway - I'm sure you've met enough people to be able to judge when somebody is a bit dodgy or not. The fact that you're posting about it on here suggests to me you've got doubts.

My main worry about somebody like that would be if he was likely to get weird afterwards. Everything will be fine just as long as he can pretend that you're not a T-gurl while you're sucking his cock - watching straight porn is a dead giveaway - but once he's cum he might feel a bit differently about it...