Boyfriend Uninterested in Sex. Found She-Male Porn on His Computer

Dr. Betty,
I've been dating my boyfriend for 3 months now and most of the time things are going great... except in the bedroom. I have a very healthy sexual appetite and I enjoy everything that sex has to offer but my boyfriend does not seem to see sex in the same way. Just for a background my boyfriend is young (19) and I am the older woman (25). So I have a lot more experience and I know exactly what makes me excited and I can tell he needs some teaching.