Particularly like the varied fingers positioning, varied fingers pressure and varied stroking rate. R clearly knows how to 'play' his penis, like a musician plays his instrument, the hot and varying masturbatory sex pleasure replacing as it were the sounds of the musical instrument.
This advanced and skilled masturbation with very varied cock stimulation is something I do a lot of. This style of masturbating causes very severe sensations in the cock while giving good control and inhibiting full orgasm which enables masturbation to go on and on and on . . . . . .