1. choose a position that'll facilitate you pressing a finger on
your anus while doing it ... side by side or T-missionary is
probably the only way
2. nearing the moment, press a finger down hard on around the
root of your night stick ... just in front of your anus .....
I got to warn you ... it's supposed to work but it didn't ...
maybe I pressed down too late ... but the rain had started by then
... it's like trying to hold a burst pipe from leaking .... it
hurted like hell .... all the juice couldn't go anywhere and the
pipe's stretched ....
Eh bro...
That technique you mentioned is either from Tantrism or some old
ancient Chinese "Skills-in-the-room" (房中术). Not just pressing like
that, there should be a certain breathing technique to go along
with it but it's usually not taught openly. Pressing is an external
act only, need internal skills (which is the breathing technique)
to go along to make it work.
The part you press should be an acupoint call 汇阴穴 (certified TCM
practitioner can correct me if I'm wrong thanks) if I'm not wrong.
That acupoint cannot anyhow press one, it's suppose to be one of
the weaker points on human body, it's machiam giving yourself a
nutcracker...