one time i was making out with a girl on my couch and she rubbed my crotch area a bunch thru my jeans, then eventually asked "where is it?" lol i said "its down there" and we made out a bit more then she left lol
Something similiar happened to me. my ex gf was rubbing me and I was hard as a rock. She didn't feel anything so she ask me how come I wasn't getting excited! We never got past making out then it was over!