I have a very large spectrum of humour, and a dark one at that. I don't feel like bringing someone's health and fertility into discussion on a forum is very appropriate, especially if you don't know the person in the slightest. I have thick skin, I'm not actually particularly offended. It's just not something I want to let slide and have to Phoebe believe it's something i'm comfortable with being brought up on a public forum, and so that he knows that those comments are not something I'd appreciate more of in the future.