I am a 31 year old female who wieghs about 190 and am 5"6 anyway I am having sexual problems. My vagina is dry when having sex and even getting oral sex I don't get a stay wet as I should. I do have asthma and allergies, what could be causing this it is ruining my relationship and my sex life. I also take birth control and have had my tubes tied. He doesnt want to have to use lube he wants it to be natural and I do to. Its been going on about 2 years now.