It would be cool to have cyborg nipples. I have so many ideas for how you could use that.
Need to charge your phone? No need to be tethered to the wall or battery brick.
Wanna consume something discreetly and directly into your bloodstream? BOOM. You're under all the influences.
Need to dial in your stroke/69 game, pop a sata cable on there and get realtime sex tips from each others nips.