I look it up every few years, and then promptly forget it all.
Madness string 102469
Obviously I knew that Grandma, having had two children, had done it twice, but it would have been in the Fifties and sex was clearly very different then and involved vacuuming the house in pearls until you caught pregnant.
Buy him Neapolitan ice cream but eat everything except the vanilla and then give it to him.