They are sitting on eachover to make babys.....
As with many insects - just a preening / cleaning behavior to get rid of dust, debris and pollen (which is sticky).
they sometimes need a boost to catch nectar or to climb up a stem of flower.
Because they are dainty and dont want to rub it on the ground because if they rub it on the ground it will get dirty.
its a 'comfort thing' .... relaxation technique, there are alot of nerve endings in the feet and when you move them around or rub them together it relaxes the entire body.
When we rub two objects together then heat energy is generated.
Rub them.
yes she has made someone rub her delicious looking gorgeous suckable feet
Rub dirty socks on your face, or rub somebody elses smelly feet on your face.
Fly's rub their legs together because they want to no that what they just ate !
An example of friction is when you rub your hands together or when you rub two sticks together it makes fire
A scrape is in the ground with their feet, and a rub is on a tree with their antlers
You can feel heat when you rub your hand together!
If you rub your two hands together nothing will happen, it will just become a little pale
ii Believe They Rub Their Two Wings Together And By That The Wings Produce Music Out Of It !