Pumping for a natural look

[subhash]

This has happened twice in recent weeks, but it never happened in the first four years of the AMS LGX.
Two girls recently (one is a call girl) commented that my penis feels mechanical/ something is different.

What they meant was it does not feel like a natural penis.

Can someone please guide me on the correct technique of pumping so that the outcome looks perfectly natural
I do tend to give several hard pumps using all my strength.

How should exactly should I go about the pumping process stepby step?

Thanks in advance