It isn't though, is it? It's a tiny risk. It doesn't follow that most sex-mad females are complete mentalist bunny boilers any more than any other woman is a bunny boiler. It just means she goes like a f***ing train.Your only worry really is if she's totally mental and ends up letting your bird find out, equally she might be sound and know the score There's only one way to find out, but it's a big risk................
And for that reason, he needs to smash the f***ing granny out of it, because there'd be a lot more on the line if he was married with kids so needs to do it while he's younger.
As I said earlier, if there is any doubt whatsover, he needs to stop thinking about it too hard and just get conkers deep, IMO.