I have read many threads about oral sex and how male cum is equivalent to female.
It's not, if she's squirting. It's basically urine -- or the composite of urine. For a long time, they haven't really researched it much, oddly enough. I saw a documentary recently where they really got down to it: Is it pee when she squirts? Yes. With a little similar seminal fluid mixed in. So if she's not squirting at all, I imagine it's just her fluid flowing as it was leading up to it -- with a little similar seminal fluid mixed in. But if she has some squirt to it -- she's peeing on you. :) They asked squirters to come in to masturbate -- and made sure their bladders were empty before doing so. They couldn't squirt in that condition.