I have a friend who is married. He and his wife currently have four children, but none of them are biologically his (step-kids). His wife would like more, but he is not diggin that idea.
Anyway, his wife asked him for some sperm, so that it could be frozen. The way she explained it was that if he were to die, she would be able to use his sperm to make a baby.
On the one hand, you could argue that he should do it, since he will be dead, so why should he mind. But this guy's got a nagging hesitation. The concept of committing to the creation of a child that would be biologically his, yet knowing he will never meet the child, will never have the opportunity to be a real father...well, he finds the whole things disturbing to say the least.
Complicated is right.