I'm 33M and I've been with my girlfriend (32F) for over 4 years. We're both professional academic types but I think most of our friends would be shocked to find out about our sexual life. We usually go more than once a day, and we like to experiment. Both of us have been told by previous lovers that we were built for porn, both in regards to our physical attributes as well as sexual abilities. Over the course of our sexual relationship she's been very open about the fact she has little to no interest in any kind of experience with another woman.