What is the longest someone has had nipple clamps on for? My other half had clothes pegs attached to my nipples whilst I was locked up this week. 2.5 hours. When she took them off me there was a searing pain for a few seconds and then it went off. Now I want to try the clover clamps whilst locked up but I am concerned they they could cause tissue damage. Btw, being Male I don’t have very large nipples!