Why, My Girlfriend will not let me cum or climax?

I love my girlfriend she is Chinese I am Australian, she is very good in many things Clean and loving, but what I am trying to understand is this we can have grate sex For many hours and I control my self not to climax, so we can do it for a long time, and she has told me she loves it she has never had a climax till she made love with me and she has had many climax together with me, but what I cannot understand is she will not let me cum on her body or let me jack-off when she is with me she don’t want me to put my cum on her, she told me I can put it in her some time after we are married, but not before. She will not take the pill and I can not use condoms, as they give me a rash, so I may use others non latex condoms if I can get them in china.

I have told her about this that it would be good that I could let my self cum out on her even if it’s not on her but let me jack-off when she is with me as I love to be close with her. But she still doesn’t want to do this. She has told me she had a boy friend before and she had even buy a home with him never married but she become busy and then he went to other country to live and they part.

I have had Chinese girlfriends before in the past but never had this problem from them they in most the time young or old love to see the cum, I have even been told by many Chinese girls that if they don’t see the man cum they believe the man don’t love them so they must see the cum or they will not stay with the man.

In the end I just need to let my self climax, when she is not with me and I am starting to believe may be if it is worth me to stay with her, as I am just making my self happy I don’t need her with me any way, she just one more factor I don’t need in the equation of life that don’t seam to make me happy, so this makes me feel sad as she is a grate girl in other things. Some one asked me if she did not need to come to my city would she want to be with me, that’s what I don’t know…..she is 29 I am 42 and she told me she don’t care the age, and the more we are together the more close we are but she still don’t let me cum out on her with her can some one help me.