I am 40y male East Asian. Married to a white woman. Married only once 15+ years. I can only have sex once with my wife then I am done. Frequency of sex used to be 2-3 times a week first few years. Now with kids once in 3-4 weeks.
I can masturbate at porn, usually lesbian porn 3 times a day easy. Within minutes. Why can't I have sex that many times with my wife?