When you wet check someone, and they are completely dry, so your hand gets a friction burn.
Savannah: Hey can I wet check you?
Lydia: Sure, but I’m a little dry!
Savannah: Owwwww, you gave my hand a friction burn!
A non-legitimate assertion regarding force-impeding drag between two surfaces.
My supposedly-on-a-strict-sugar-free-diet cousin claimed dat its having taken him a longer-than-normal time to pedal to da hardware store and back was merely due to da bike's having stiff bearings and there being a strong headwind during part of da journey, but dat was obviously just a frictional statement dat he'd made up in an attempt to cover for da fact dat he had actually stopped at da candy store on his way back --- I happened to know dat da weather was dead-calm dat day, plus I had thoroughly greased and oiled said two-wheeler just a few days earlier.
When 2 ballsacks touch during a 3-4 way.
During a pretty steamy 3 way, Tim's ballsack touched Chris's ball sack, creating nut friction.