Lol, in these movies from the 50s it's difficult to say who sleeps with who... even Dorothy, in her big romantic scene with the leading bloke, goes no further than a kiss; at which point the scene ends, and we move to next morning. Like, we can't say for sure if they slept together that night or not.
But we do know a few things about Dorothy's past from Lorelei, who said Dorothy is always running from one musclebound stud to another. And that musical number in the Olympic team's gym... WOW. Dorothy goes into the gym (where all the male athletes in the american Olympic team are doing their training, most of them in shorts and bare-chested, showing up their sculpted muscular physiques) and basically asks the lot of them if someone, anyone, wants to fuck? Because, as for her, she's ready and raring to go!
I'm not trying to slut-shame her or anything; on the contrary: I'm all for sexual freedom! All I'm saying, doctor, is that I think that we can accurately diagnose a touch of nymphomania in her case.