One of my pet-sitting clients has two Corgis.....one is neutered and one is not. The reason for this is that when she had the first one neutered, her boyfriend was so upset they got in a big fight and did not speak for days!
We also have a friend who went through all kinds of complications after a tubal ligation because her husband refused to have a vasectomy. Rather than him spending 20 minutes on an outpatient procedure and an afternoon sitting on a bag of frozen peas, she spent weeks feeling horrible and going back and forth to the hospital. It was nuts (no pun intended, lol!). I think she should have refused to give him any until he got himself fixed!
I guess I am lucky....my husband was all too happy to have our pets neutered, and didn't put up a fuss about his own vasectomy. We had agreed to it while we were dating....then when we got engaged and were deciding on a wedding date I told him I was not walking down the aisle until he was snipped. He made the appointment the following week. Either he really wanted to marry me, or really thought I would be a horrible parent, lol!