People often joke about athletics checks or constitution saves... but let's be real here: the check you should be making during intimacy is probably an insight check to better read what your partner needs or is enjoying most ^.^
I was thinking Acrobatics and Performance, but you make a good point!
"You may call it 'nonsense' if you like, but I've heard nonsense, compared with which that would be as sensible as a dictionary!"
