Grav-i-titty Faux Pas
This occurs when sadly yet inevitably time and gravity take their toll on a woman’s breasts and they start to progressively hang lower and lower. The man still wants to get hot for her but this too becomes increasingly difficult so he fantasises in his mind back to when they were firm and young. Carried away by fond memories he reaches over to cop a feel and he accidentally puts his hand above where her tits actually are now and instead he winds up trying to squeeze the area where her tits used to be.
I had another Grav-i-titty Faux Pas two weeks ago and my wife still isn't speaking to me!