Part 1. I love my balls played with, and Yes, squeezing firmly while you cum feels amazing, however my experience has only been with Palm-ala, yet it would be hot for a woman to reach back, bend over, and when I say “I am gonna cum,” having her grip my soaking wet balls with her feminine hands while I unload inside her. I guess I will have to find out. Doggystyle would be the ideal position for that, I suppose.
Part 2. Does “getting spanked/hit on the inside of the thighs feel good for a girl?”
In my experience the inner-thigh is usually coupled with bondage, and it’s not so much about what “feels good” but “what is unexpected” and sends an reaction and impulse. So maybe I am not the best person to ask.
Most times there has been a blindfold involved, so a hard smack anywhere serves a purpose. The inner thigh is very sensitive area, so it’s like any other sensitive area, yet it’s close to your pussy so it sends a signal that “your flower may be next, so you should be worried.”
Slapping inside of the thighs is not typically a place I’d go to in just a fit of passion, usually because I am in between them, either with my face or body. Normally, those “slappy places” are just ass, pussy, face, and tits – you know, all Christian-like. Fuck, I sound like a freak saying that out loud.