that's a great idea! the girl could grind a load of you like that!
we went to a strip club a few months ago and one of my friends was getting a great lap dance and when she was done i asked her how it was...she came! i knew she was enjoying it when the dancer had her thigh in between her legs and right on her pussy but i didn't realize it got her off! i said "OMG, you whore"...lol i teased her the rest of the night
i wonder how many guys can cum from a lap dance?
I have lots, all you need is for it to be slippery. In lieu of a condom, I put saran wrap flat in the front part of my underwear along with liquid soap for lube and it got the job done when she grinded me there. A bit messier cleanup than the condom method though.
I think other guys do variations of what I mention here, becuase I see the paraphernalia, such as condom wrappers lube containers in the trash or on the floor in the mens room.
I like your story though, a girl getting off as a lap dance customer. Not to sound bragging, but a dancer I used to see often would come with me, she'd have her clit right up against my cock and we'd groove for two or 3 songs, and I could feel her focus i.e. not just doing her job. Also, every time when she was close she'd shove her nipple in my mouth, that's how I knew it was for her and I was going along for the ride. Sometimes, I'd come before her and fight the hyper sensitive feeling afterward to let her forge on.