First two things:
1) We use correct names for our anatomy around here. No "hoo-hoo" or "weenie" or whatever - we call them by their proper names.
2) We don't tend to use "peanut" as a pet name - probably because Caris is deathly allergic so "peanut" doesn't seem all that endearing.
I changed Canaan's diaper the other day and once I was all done I said, "what's up, peanut?" Canaan looked at me for a second and said, "huh?" I repeated: "what's up, peanut?" He pointed to his diaper zone and said, "that one? Peanut?" I literally LOL, emphasis on loud.