To cut a long story short, have fertility problems and treatment being necessary, donor sperm is needed amongst others.
I haven't broadcast it from the rooftops
but I haven't made a secret of it either, amongst fairly close friends at any rate and when people first found out what was at first a minor irritant is now really, really pissing me off. When I first told my friend that I'd need donor sperm she piped up with "HEY! You could have some of (her DHs)" The same friend today suggested my brother could give me some of his sperm, then fell about laughing when I gave her a disgusted look 
I've also had 'friends' offer me some from their husbands or boyfriends. They aren't being serious - I think most of them would run away screaming if I said "oh go on then" but in a way, that's worse. It's like they don't take it, or me, seriously, and to be honest that hurts.
At first I thought it was just embarrassment - I've explained where the sperm comes from (in terms of banks, you understand) and that it is vetted and regulated and checked but I am just sick of contending with these childish pathetic comments.
Sorry - a rant rather than AIBU. I'm not being U! At least I don't think I am!