Transform into one of the single most passable trap on this planet, like full on "draw a girl, call it a boy" shit where it'd be impossible to buy that I was a boy. Then I go to clubs to pick up dudes, get all friendly, pull all that "I'm an easy lay" shit while being super fucking hot to the point where no hot blooded male would turn down an advance, lead them back to my apartment or whatever. We kiss and fondle a bit, but eventually I back off and say "wait, before we continue, there's something I need to show you," that's when the real fun starts.
As I pull down my pants I at the same time shape shift a dick, and not just some normal looking dick, we're talking the most obscenely monstrous motherfuckers on this planet, as thick as a god damn neck, and I just keep growing this fucker as I pull down my pants until they go all the way down to may ankles, the glans of my ultra-dick just barely visible above my belt. The men will just sit there, staring in absolute horror at a three foot long dong that seems to have been pulled of a magic hat trick, but they only see it in its flaccid state at first; because just when they think they're lucid again I start growing that fucker into the single most triumphant erection in this entire universe, that thing turning into a monolithic veiny behemoth that doesn't stop growing until it loudly knocks against the ceiling, the dick larger than my body and now giving an unobstructed view of a pair of testicles so large I can use them as a bean bag chair.