I'm a straight guy and I love playing with my nipples and having females play with them. I like them squeezed and pinched very hard. I've noticed that nipple stimulation feels 10 times better when I am on heroin, they seem so much more sensitive. When I am on dope I often sit there for hours and play with my nipples because it feels so good. Does anyone else notice that their nipples become more sensitive on heroin?