no psychologist here, but wouldn’t the “doing nothing different” be the cause?
maybe try a few toys, there’s so many types these days, putting stuff up in the ass is also a good choice, lots of pleasure points there for both sexes
maybe you could find some relieve exploring your own body? that worked somewhat for me, maybe I’ve become a pervert or a degenerate, but I feel very good about myself and with myself
I throw you another question, why not?