What you don't see is that the gal with lighter skin is getting her head kicked repeatedly and they're both, instead of making hot-and-bothered faces, saying, "oh wait, almost got it! Damnit, stop moving!" XD
If you hold their thigh against your body and sit on their other leg, while using both hands to prevent the only free leg from moving, you can very much prevent her legs from kicking you.
(I have a UFC buddy that wants to fight me all the time, I learned my stuff, mister.)
XD Okay, I suppose that if one of 'em is drugged, it could make sense! I didn't mean to come across as attacking, though I'm still sticking to my guns!