Just my 2 cents

Your uterus does contract during orgasm. When you're pregnant, during the last few weeks you're due, I've read and had it confirmed by my doctor that having a really good orgasm will cause the uterus to contract and can stimulate child birth (as well as the oxytocin) and also recommended a a good orgasm after the 6 wks thing stay to help contract the uterus to help it go back to its normal size.

And I am gusher but can squirt, squirting takes more work. I have frequent vaginal orgasms. In fact I am really the only girl I've ever met that can have multiple vaginal orgasms pretty much every time I have sex.

And that didn't actually occur until after I had my son. *shrug* no foreplay involved, nothing, and I have to really control it or I gush all over the bed...its rather icky sometimes and I get sick of washing the sheets so I have an "orgasm" towel lol.

I have heard that every anatomy is a bit different and so not every woman as a g*spot or the ability to have it properly stimulated to produce a great orgasm...I however can have g*spot orgasms, vaginal orgasms and clitoral orgasms and each one has its own sensation and seems to stimulate different responses in the muscles.