A game played at primary school, and a shocking parody of the life that was to await some of us in 4 or 5 years time. We'd take off our jackets and stuff them up our jumpers, pretending that the resulting bump meant we were heavily pregnant. The McGregors then walked around, hand on hip, complaining "Ooooh, my back's killing me" or "My ankles have swollen up". More mundane phrases would include "When's your's due, then? I've got two weeks yet."
The game came to a thrilling climax when the best McGregor, Naomi Smith, would proudly announce that her piles were playing up. We didn't know what piles were. I bet she does now, though. Ha.

Aged about 12 or 13, a friend and I (both female) would go into shops and look at baby clothes whilst loudly remarking on how "this would suit your youngest" or similar. The horrified looks of surrounding adults brought us much amusement, at least until we were asked to leave the shop.