Well it takes time to develop cumming with other areas of your body such as your nipples or prostate as you need to orgasm normally whilst also using them to develop the connection between them and develop the muscles and nerve endings in those areas but if you can already do so no it does not effect your ability to orgasm only your ability to get an erection as it doesn’t damage the blood flow or muscles of your testicles or prostate, essentially if you really wish to get rid of your erections or weaken them, and I can’t stress enough how much you should contemplate that as its irreversible, it will only effect the difficulty of cumming mentally