Hair pulling is concidered an act of sex; when somebody is being taken from behind, their hair is pulled. The giver will grab the receivers hair and tug whilst giving pleasure from behind.
It is another form of the commonly used 'love handles'.
An example of this would be:
A couple having sex...
The giver will take the receiver from behind and pull their hair whilst giving them pleaser. Another form of 'love handles'.
'I like a bit of hair pulling whilst being taken from behind'