Asian gay cums without hands during penetration

I would love to master the technique of ejaculating without touching myself just like this young asian gay boy when he cums without hands while his boy fucks him in the ass. the trick has to be somewhere and i think it has nothing to do with the tantric issue as some claim, it will just be a matter of training and practice. in some gay porn videos that i have seen on pornotubes i have had the feeling that they had a small vibrator inserted into their anus that would most likely stimulate their g-spot, but in other cases i am sure that they had not inserted anything and they ejaculated non-stop. for a long time. we would be delighted to hear your experiences and if you can contribute something to our website we will be all ears, i am sure that all our users are eager to hear your technique and even more than that, that you tell them in first person how the cum flows from your cock...