Who only offer their 'services' if it's through natural insemination (I.e having sex with the woman) or the woman performing a sex act on them! 
I more than likely am but just need a rant!
A dear friend of mine and her girlfriend have decided that they would like nothing more than to start a family but since they cannot afford IVF they have went down the route of sperm donation and artificial insemination. The thing is most of the 'donors' they have found that are in the same location (or close) and contacted more or less demand NI which really isn't an option for these two ladies!
I'm sorry I know people have preference and some women pick NI, nothing wrong with that as it can be more affective that artificial insemination but honestly in my opinion these men are completely sleazy and are preying on desperate women for sex! They claim to be offering their services because they want to help and make a difference yet they only want sex?!
Yes, there are numerous sperm donors but unless the women picks NI I don't think men like this should be allowed to take advantage of women or couples who are desperate for a baby! 