This is an aside from the sexuatlity issue. I am interested in your uncle who is diabetic and overweight. Is he doing anything to help control the condition? Probably had blood problems and in particular high cholesterol.
Not sure if he is already on medications. He can control his diabetes better with some natural alternatives. I have a lady friend in MA who is also diabetic but got it under control and does not need to take medications.
Check out this website - www.osumex.com
Read the sections on probiotic and the oils. You can navigate on the box on the top left.