One way to stimulate the penis is sliding: moving your mouth up and down his penis.
Wrap your hand around the bottom half of the penis and encircle your teeth with your lips.
Make a ring with your lips around the glans penis.
Slide up and down the top part of the penis, letting it go down as far as feels comfortable. You can also use ‘the ring.’
Use a lot of saliva to make your mouth really slide. This feels better and will avoid irritation of the skin.
While you let the penis slide up, you can both stimulate the penis with your lips and suck on it.
Go faster as your lover gets more excited and get into a regular rhythm so he’ll be able to climax.