Hahaha that's a good one!! Definitely thought up by a man! Not telling hubby, he's been moaning about the lack of that as it is! Ha.
I can understand orgasms might work, oxytocin is the hormone that starts labour and it's release is constantly restimulated by the stretching in the uterus every time you have a contraction. It creates a positive feedback loop so more gets released, more stretching/ contractions... Etc until baby is born.
Sorry, you can tell I just did a biology exam! Xx