I've been a Cuck for over 20 years, and haven't had any intercourse with my Hot-wife since 2011. I'm not "cut-off", we both agreed to this lifestyle.
For the past 3 years, she's gone totally Black, and gets laid about twice a month. Over this period, she has gradually lost interest in any kind of sex with me, and recently stopped all contact with my cock. I've let her know I'm OK with this and let her know I enjoy masturbating and her activity with BBCs. The only time I get any pussy from her is after she has sex, I get to lick her pussy after her guy leaves when she's not too tired.
Over the years, I've gradually lost my desire to have intercourse and really only enjoy masturbating before, during, and after she's getting laid. As I've gotten older, I've forgotten what pussy feels like and my cock never gets hard enough to fuck anyways.
We both enjoy each other and our marriage, but prefer this lifestyle with her sexual activity and satifaction being at the center of our sexual relationship. She's never been into humiliating me, or that part of cuckolding.