PeterParker

I have a couple questions maybe someone could answer for me. My girlfriend doesn't like to perform oral sex because in the past it hasn't been very good and she hasn't been able to get me off. When I try to give her some pointers she gets angry and it ruins the mood. I always wish I could send her an article from this site, but I don't think I could ever do that. Any suggestions? Also, is it possible to not be able to achieve an orgasm via vaginal stimulation? She claims it is not possible for her, but has no trouble reaching a clitoral orgasm. Anything else I can try? Thanks in advance.