I"ve not donated, but was on the short list from a female friend and we discussed it a little. I came to the conclusion I could not do it. I didn't like the idea of having a child out there I didn't know (much as I do not have any kids now anyway, by choice)-- I know there was a guy giving away his sperm on CL a while ago, and he fathered dozens of kids, and had pix of them, etc.