I am a forty nine year old married female. I have one son who is 20 years old. My problem is I am able to have foreplay with my spouse but not able to have actual sex with him. I dislike it but enjoy the foreplay. It is now almost more than 8 years that I have not had a complete act with my husband. Instead I use his knee to give me pressure and feel happy with it. I had developed this knee technique as I had spotting problem during my pregnancy if I had normal sex and till date the same thing continues. Please advise.