"69" - the position of mutual sucking

The "69" position is where one lover lies head to tail over the other and each gives the other simultaneous oral stimulation.

Oral stimulation in this position will work comfortably if her mouth is large enough for his penis and if he doesn't thrust violently.

Totally engorging the erect penis in her mouth she presses and caresses his
testicles, allowing her saliva to flow over them.

Pressing the cheeks of her buttocks apart, the man is able to caress the widely
opened lips of her vulva with the tip of his tongue at his pleasure, likewise
titillating her anus with his tongue. He could also stimulate her clitoris.

If you are a couple who enjoy licking and probing the genitals with the tongue,
then this can be a tremendously exciting route to simultaneous orgasm.

Hot spots

When sensitive areas of your body are stroked, your nerve endings are stimulated and pockets of explosive sensation erupt. As well as exploring the obvious erogenous zones —the breasts, nipples, and genitals—seek out the less obvious ones too. Explore your lover’s feet, toes, neck, buttocks, ears, and those sensitive little spots behind the knees and in the crooks of the elbows.

For him and her
Him: stroke your penis as she caresses you. Four hands are better than two!
Her: lick your index finger and brush it lightly over your nipples as he strokes you.

Take your fingers on a tour of his or her body...then use your tongue.