My friend bought these for me and i love them. These on my nipples are about the only way i can cum by rubbing my clit while reading a porno story. I love to pull then on my nipples. Some times i tie a rope to a pipe in my house and put it through the chain and pull on the rope so it realy gets tight and thats when it hurts the worst for me but i love it any way and that is how i cum the fastest