Answer: I am aware that other women experience this, but I am not sure of the exact cause. A few women have reported experiencing pain as a result. It may be related to having tense pelvic muscles. Many women do not realize they walk around all day with clenched pelvic muscles. Learn how to do Kegel exercises, not to make your muscles stronger, but to know how to relax them. Also, experiment with vaginal and anal massage. See if you cannot get your vagina and anus to relax and open up, prior to orgasm. The vagina and anus share some of the same muscles, that is why I mention anal massage as well. You might want to discuss this with the women on the discussion group I link to below.