One technique which you may really enjoy is for two of you to lie on your backs side by side
with the other person on his knees between your legs bending over you.
He will then masturbate the two of you on their backs at the same time using both hands.
The two being masturbated have their hands free to play with the guys lingam, massage his balls,
pinch his nipples or do anything else that excites him. Take turns before the top guys knees give in.
Before you ejaculate the one who has been masturbating you stops and lies down between you.
You then try to climax at the same time while stroking yourselves.
Alternatvely the guy who has been masturbating will stay in position over you stroking himself
until he ejaculates over the other two.
There's usually a lot of semen to clean up.