Tree species of hawkmoth have been recorded to emit ultrasound clicks by rubbing their genitalia; males produce by rubbing rigid scales on the exterior of the claspers while females produce sound by contracting their genitalia which causes rubbing of scales against the abdomen.
Dirty girths and saddle cloths can cause rubbing.
Diaper rash can be as simple as minor skin irritation caused by rubbing of the wet diaper, an actual chemical burn from the urine interacting with something in the poop, or the start of an infection.
In surgical series, arachnoiditis caused by repeated rubbing of the abnormally herniated cerebellar tonsils against the leptomeninge and dura mater in the foramen magnum has been reported.
The thigh as the commonest injury site could be due to chafing usually caused by repetitive rubbing of one area of skin against another or against an article of clothing.
High internal stress occurs in thin PE acetabular liners, and plastic flow is caused by the rubbing of the backside surface against the edge of the screw hole in the metal acetabular shell.
Alberto W. Vilar, once a wildly successful investor, gave away tens of millions of dollars for cultural causes, rubbing cuff links with patrons and plutocrats.
The coarser grit size abrasives have bigger abrasive particles, causing larger areas of rubbing during grinding; meanwhile, the size and distribution of the abrasive grit grains are more uneven in coarser grit size abrasives; thus, more defects and a worse surface finish have been induced by using coarser grit size abrasives.
An impingement injury, which is caused by too much rubbing of the muscles of the shoulder against the acromion - the upper part of the shoulder blade.
Although allergy may cause eye rubbing, it is not the only provocative factor, since a much higher percentage of patients rubbed their eyes than the percentage of patients with allergy.
