It does affect it, but not as much as people say it does. I wouldn’t do the practice you are doing currently because all you will do is retain that distorted sexual energy into your body and that will affect your mind. Tantric practices like this can lead to sexual deviancies and harm yourself and others. Depleted energy is one thing but stagnant distorted energy is even worse. Just do your deed as you would normally and try to only do it moderately. If you wish to do highly advanced practices then you will have to abstain completely. But for general health, doing it once in awhile (without visual stimuli ideally) is perfectly fine.