German married chubby couple

My wife and I do not have a normal sex life. She avoids sex with me because my penis does not satisfy her and she never gets an orgasm from me. The reasons are that I have a small under average penis which rarely gets hard. Most of the time the flaccid or semi flaccid penis slips right back out of her pussy during sex. Also, I always cum prematurely after 20-50 seconds. I have accepted that I am a sexual failure and my wife sees the same. Alternatively to real and normal sex I have developed many fetishes. My wife is aware of my fetishes and supports them as long as we do not have sex together. She knows that I masturbate a lot to interracial, cuckold and beta porn and talk and jerk off with others over the internet. She also knows that I penetrate fleshlights and worn shoes and occasionally wear lingerie. The only common semi-sexual interaction she likes with me is when I masturbate at her feet and she verbally humiliates me. I never thought that my pussy free beta life would make me so sexually happy, that my wife would love me even though I am a sexual failure and I would rather see her have sex with a black man than have sex with me.