Our eight year old asked, "why do women have mensus, mummy? is it painful, mummy?
"women have to get rid of dirty blood, it is not painful", the wife said.
Not quite right I thought. So I added " women carries eggs in Thier womBS."
"eeeeeeeee!you mean llike chicken eggs?"
"Not, quite, but these are human eggs. So if eggs are not used they turn bad, so they have to be discharged"
ooooh … we were lucky there was no further question. We were very sure that it will be the conversation of the day at school tomorrow.