As I have gotten older and more experienced more use by men I have learnt that having sensitive nipples is good. Mine are fairly thick and are very sensitive and are erect most of the time. I have been told by many that they should be stretched longer and they would then resemble cow teats and as I have been told my **** resemble cow udders I understand what has been meant. In use I have had weights placed on them and also suction an odd couple of times all of which has been very pleasant. I recently was informed that it is possible to tie them with string circling them making them stretch out longer and the more that this happens apparently maybe sometimes with weights will increase the ability to stretch them. I would like to be able to get assistance to do this as its not easy on my own and then hopefully they would be somewhat longer.