Where can you find sexual positions for when the male is overweight and the woman is not?
If you are in love with a woman but do not think of her in a sexual way does that mean you are a lesbian?
You make love to an obese woman in much the same way that you make love to a slim woman. You talk with her, you listen to her, you find out what you both want, you experiment and find out what works for the two of you. Love is an ongoing process, not just the act of sexual intercourse. Sure, there are differences, but everyone is different.
The only way that a man can have a baby is if he has been a woman in the past, or has woman organs. Or if you are talking about just getting a child, he can adopt or find a woman he likes and when they are both ready, have sexual intercourse without contraception until she becomes pregnant and eventually she will give birth.