I had a few different boyfriend's and none of them would do this. Then I got with my current boyfriend, and he licked my vagina. I couldn't believe how good and intense it felt. I wanted him to lick me each lovemaking session.
My other boyfriend's seemed like they wanted quickies. My current boyfriend and me can make love for hours. Sometimes we have an evening in bed. I can only say, that I have multiple deep orgasms thanks to him.