I have noticed along the lines of the wishes for a girl or boy, if my sims roll one, I usually keep it, and then they have always had what they wished for. My sims do not eat, because I use the cheats to keep their motives maxed, so the food doesn't affect them, but I haven't seen one of those wishes be wrong yet, so maybe there is more to the wishes.
I've only had one conflicting wish from both parents, mom wanted a girl, and dad wanted a boy, I clicked mom's first and a few sim hours later, dad rolled up the wish to have a boy, and I clicked it as well, but remembered that I already gave mom the girl one, so I deleted his wish. They had a girl. Of course that could just be coincidences in my game, but it hasn't failed yet.
Coincidence. Both of mine wished for a boy and had six girls. No watermelons involved either.
My mother lived in East Berlin until she was seven (leaving several years before the wall went up). She has told me all my life that 'people' is Berlinner slang for penis, but I'm not about to argue the fact with an actual Berlinner.
I live in Berlin and have never heard that before. I guess it had to do with the fact that your mom was only seven, it may have been a word for kids to use.