I am not sure about stopping a day or two. It makes it worse as I come too quickly. Masturbation helps with stamina, if done a day before. Maybe it's that my wife doesn't get into it. Maybe her lack...
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....