Because I over heard woman talking about this and I was like WTF, I was just curious if anyone else has done this. I heard of different positions and stuff but never this.
I've heard of it. I've also read about removing acidic foods and liquids from your diet to improve the alkaline levels of your uterus for a better chance at conceiving a boy. It's because studies have shown that male and female sperm require different environments for survival (i.e. more alkaline/less acidic for male sperm, and more acidic/less alkaline for female sperm). This also ties in with the positions to use to help or hinder the different gender sperm to meet the egg. Reproduction is a physical thing... it's just an analysis of the body's conditions through the process.
Seems like there was some over reacting to this question... yikes.
Re: acidic diet