Obviously I'm not a woman but I myself only recall one woman who didn't swallow my cum the first time we had sex. I married two of them. The rest were dates in between marriages. I believe there are more out there that do, but don't admit it to their friends.
My first time hiving a blow job I was 15. It was with a 17yr old boy from fown the road we walk home from school together most days. One day he asked if I wanted a cigarette at his house, so we both smoked one. This continued for about a week before we started pashing on. He pulled out his cock & I started to stroke it, which he liked. He then asked if I would suck it. Having never done it before I was a bit nervous but none the less I agreed & started blowing him. Well he was telling me how good it felt & not to stop. By now I was getting right into it, he said he wanted me to make him cum. I thought wow I must be doing it right. He said dont stop I'm close. Then I felt him push into me he yelled Oh Fuck & he started to cum in my mouth. I kept going until he had stopped cuming then just swallowed it all. He said did you just swallow it, yes I said This became our after school ritual for several months. The taste never bothered me & I used to look forward to doing it.