How to shake it healthy and eco-friendly: Relieve yourself without the mess, no need for kleenex etc.

Med student here.

Today you will learn how to masturbate without ever losing cum again, the same method is also awesome training for longer sexytime.

Right between your anus and your scrotum, guys, there is a point where your semen tubes are located just beneath your skin. It is just this point that you have to press with two fingers the very moment you are about to ejaculate. If you can feel the pelvic bone softly under your fingers it is just right. If you press with enough force (it will not hurt, the area is quite insensitive to pressure) just before and during orgasm you will have the same old feeling, only without any ejaculation (maybe a little at the beginning). Often, your orgasm will last a little longer, as your ejaculatory musculature realizes the resistance and pushes harder. All your semen is diverted into your bladder and leaves neatly diluted (i.e. not sticky) into the toilet the next time you take a wee. If you do this regularly, not only can you say goodbye to cum stains, socks, kleenex etc., but you will also last significantly longer in bed when with an actual partner.

TL;DR: Safe method for more pleasurable and non-ejaculatory masturbation. Try it out!