Interesting. I love penetrative sex. I don't get clitoral orgasms from it, but it causes my uterus to clench and contract in pleasure. I have screamed in pleasure from penetrative sex. The pleasure just isn't in the clit, it's in the lower belly. It feels like when you get that "swooping" feeling on a rollercoaster but way better.
Could be that my partner really cares about my pleasure and I love and feel safe with him?