The common term for this act is "frot." Mutual masturbation is also descriptive of this act, though it may be confusing as it also refers to two or more men masturbating with each other while not necessarily allowing their penises to touch.
scissor sisters
Its called scissoring
teasing
Suck, Lick , Stroke, Rub
Rub eachother's penises until white fluid called AIDS comes out, then they drink it & repeat.
Male and female birds have a vent that is called a cloaca. This vent is shared by the digestive and reproductive systems. When both females and males are ready to breed, they rub their cloacas together.
Some men like it.
The sound is actually called a Pleural rub.
Penis docking is when you rub your penis against another, like rubbing two penises together. actually, that is technically frottage. Docking is when a penis is inserted underneath the foreskin of an uncircumcised man's penis and the two are rubbed together.
They will rub their vagain's together
Static Electricity!
A fault line is a place where two plates rub together. This tectonic activity can cause earthquakes both on dry land and underwater. When it happens underwater, it can create a tsunami.
When we rub two objects together then heat energy is generated.
When you rub wood & fur together, a heat/electric energy is released. this energy is called "friction". Friction moves so fast that the "shock" you feel is actually the energy moving to your body.
Fly's rub their legs together because they want to no that what they just ate !