So, I went to see Magic Mike and I can confirm that
Olivia Munn is indeed topless in the movie. She doesn't have three nude scenes in the movie, just one, but there are two other nude scenes in the movie, which involve topless girls, obviously there are lots of male butts, it's a movie about male strippers after all. Channing Tatum shows off his but a couple of times I believe.
Right in the beginning of the movie, some 2 minutes in wee see
Olivia putting on her bra after she spent a night with Magic Mike (Tatum). Her breasts kind of remind me of
Demi Moore's from Striptease, just the shape, nice and round, only smaller.
I Didn't really like the lightning in that scene, come to think of it, I didn't like how movie was lit as a whole. It was some brownish/yellow shade, very similar to Shameless TV series. I Can't stand that shade.
Riley Keough is also briefly topless, lying on a bed in the background, passed out.
There's one more topless girl in the movie, I am not sure, but it might be
Mircea Monroe. If it is her, then she bought herself a new pair as they look huge. Although, she does say in the movie that they are real...
As for the story or plot of the movie... there isn't any. At least I failed to see it, and most of the people, leaving the theater, were asking each other what was this movie all about.