My Grlfriend and I have been having problems recently and she broke up with me after 4 years because she cheated with another man. I have forgiven her and have told her I want to give it another go. However I am quite an old fashioned guy when it comes to sex and i have certain beliefs. sex is not a problem for me I enjoy making love and having a cuddle and a talk in each others arms after but the trouble is I cant touch my girlfriend "down there" because I feel quite dirty when I do. It might sound silly but I dont think you should do things like that with the woman you love and the mother of your children. Its something I will never be comfortable with and she refuses to compromise. She has given me an ultimatum and basically said "you use your hand during sex or its over". She blames the cheating on the fact that I wont do it. I dont know what to do as I will never be comfortable with treating my girlfriend like a whore during love making.

please help!