Pick your sex......?

I’ve always wanted 2 kids,….a boy and a girl, and the boy first…….and so far I had my first child a boy,….just as asked……but now I’m hoping that in a year or so I get pregnant again,..and I really hope it’s a girl. I mean gender has never been suuuper important but it would be awesome to get the experience of raising a boy and a girl.
People ask me if I want more kids and I say yes,…and I mention that I would like God to bless me with a little girl next. Among the many people who have asked this question was a cousin of mine whom owned a farm years ago and he told me something that may make sense. He said “we’re animals and we’re just like cows when it’s come to reproduction…..if you want a boy you wait for the full moon. If you want a girl you wait for the new moon.” He said he has 2 children a boy and a girl and he sad he “planned” both. Now I don’t know if this may be true because I don’t know the exact date that my baby boy was conceived. Is this possible? He told me that this was the method used by farmers in Dominican Republic to get more female cows conceived. I’ve heard other stories like, “want a boy? Have sex with your socks on.” Um,…yea and what scientific theory supports this?