Meh, still kids are still gross and making them is a really odd fetish too, because it's not really taboo or much of a fetish at all. You know you can probably find women to impregnate in real life and have them sign a legal notarized contract that exempts you from child support payments, effectively making you a sperm donor. Seriously, women and their biological clocks man. At least half of my relationships went to shit because of that garbage. -_- If I could find women who want to do anal that easily I wouldn't be spending so much time looking at porn. You should make a craigslist ad or something. Pro tip, lie about your credentials and achievements and have friends numbers on your resume who would lie for you, unlike a business regular people might actually call those.
Wear a suit and be clean cut when you go to meet potential "clients" and charge a reasonable but affordable fee of like a 150-200 dollars per hour session. The more legitimate you seem the more offers you'll get. Don't ask how I know this, let's just say I've friends in the escort business so I picked up a few things over the years, oh, and bring flowers for that extra touch of appearing to care and being sensitive. On their end you should ask for a picture and detail resume as well, all professional escort services require background checks, and you should know what you're putting your dick in beforehand. You don't need to do a background check, you just want the info to accept or decline clients without having to ask them for their info in some otherwise unprofessional manner like, "I need to know if you're my type" so asking it for background checking and financial credibility purposes is the smart way to play it. If you can find a friend to act as your handler and take your calls for you that makes it even better, makes it seem like a more professional operation.
Hmmm, yeah, I think that's about it and you got a solid con... ahem.. business, to impregnate women. With notaries and legal documentation, you will need to hire a paralegal to help with that stuff, and given the paper trail, your sperm donation business will have to pay taxes. It's not prostitution as you're not selling sex, but having a legal agreement to receive money for your services makes you liable to IRS inquiry. Small price to pay for not having to pay child support. Now, before you get too excited you should check your state local laws concerning sperm donations of this nature, as long as there are no state side laws that would cause you problems it's safe to pursue this as a side business. I can't remember what state it was.. maybe Cali? I do recall reading about some guy that got in trouble for doing this sort of thing, though his operation wasn't nearly as well thought out as mine is. Basically modeling it on an escort business.
I take no responsibility for any legal problems that may result from taking any part of my suggestion, and I'm not a lawyer nor am I accredited by any state BAR. Don't take this as legal advice, consult a local lawyer if you have questions regarding your local regulations. Which, as I said, you'll need to hire a paralegal from some firm to help with your contract writing anyway, may as well get some consultation during that process.