So one of the first times I did foreplay on a girl, After a few times of getting her off with clit stim and fingering, I had her on the couch, reverse cowgirl, with me rubbing aggressively over her stimmed bean, every time she'd shift to avoid pleasure I'd pull her back,

During this I noticed, her finger nails digging into my arm, and it hurt, but I ignored it, cause I was pleasuring her... and maybe there was some satisfaction in knowning she was feeling it so much she was digging herself in to hold on...

Do girls do that intentionally? Cause she said once she's horny , she doesn't really notice that...

Something similar when she bit into my sholder when she came on another occasion.