My boyfriend loved the idea of these from the first time he saw them, I didn't think I was going to be able to handle them but part of me was still intrigued by them. On arrival I was surprised by how big they were but quickly got to trying them out, I found they didn't really do a whole lot in terms of sensitivity on my nipples and caused the enlargement more to the areola than the actual nipple bit itself, but all in all good fun. we then thought to use it elsewhere as a clit pump in which the increased sensitivity was rather pleasurable and it kept its seal well on various parts of the body.