nookie & diddle
Don't know about down south, Anna, but around here no one but a deacon's wife would consider "nookie" really obsecene; it's a sort of comic word.

On the other hand, I made a spectacle of myself laughing out loud in the office over Bel's marvelous term "diddle night". As soon as I get home, I shall rush into the kitchen, where the calendar lives, and write it in for a number of dates in March.