Recently someone described the pleasure of doing five strokes then pausing and repeating this to make it last. I find one stroke and pause gives the most powerful throb. The best aching throb is achieved with finger and thumb either held straight across over the foreskin or, with talc and the skin held back, making a ring round the base of the glans. The stroke I mean is a short quick move down and up.
It is possible to trace and enjoy each throb to its very roots! Using the free hand use the finger tips to touch or hold the concealed length of hard behind the scrotum. Of course the penis throbs visibly without touching and this can also be felt lower down.
To find the very roots of each throb lube up one finger and push it a short way into the anus. The throbs are now back in a ring with the sphincter muscles tightening and relaxing as they do when ejaculating, and in the same way to be experienced when a woman's anus spasms during orgasm..