Not all women give oral sex. I have slept with girls who thought it was disgusting - these are the same ones who never fully embrace sex, and interestingly, they are the ones who have a hard time achieving an orgasm. When they do, the orgasm isn't strong. See how important the psychological part is.
I also slept with a feminist (ahem) who didn't do oral sex on principle, because it was demeaning to women, etc. She also had this long hair growing on one breast that she for some reason didn't pull out. Probably because "she shouldn't have to".
Sleeping with a feminist will either get you machine-like sex ("Because it's just a biological need, nothing special" - and these feminists will give oral sex) where she is likely to keep her eyes open at all times, or reluctant sex where she prides herself on withholding some things. Also, feminists learn that the man should formally ask before penetration, otherwise it is rape. That girl for example, when I didn't ask, still said "Yes, you may" even though I hadn't said anything. Weird but true. But I digress.