If you mean rub heads, it's a way of showing affection or a need for attention.
Cats communicate many complex concepts through body language. They lead many actions with a motion of their head, a head pushing forward is a greeting.
Cats hit people for the same reason that people hit people: they hate and despise you.
Domesticated cats mark their territiory by rubbing the top of their head on objects. There is oil glands in their head that marks a scent that is their own to say "this is mine."
Butt-head was created in 1992.
Beavis and Butt-Head - 1993 The Butt-head Experience - 2.23 was released on: USA: 7 June 1993
Yes Is is a butt head and he is also poopy crap!!!!!!!!!!!!!!
Beavis and Butt-Head - 1993 The Bride of Butt-head 7-20 was released on: USA: 18 July 1997
Beavis and Butt-Head - 1993 Citizen Butt-head 3-12 was released on: USA: 18 October 1993
Generally, if something has a butt, it is considered to be the rump of it.
A couple, Vival la cornholio, Butt O Ween, The best thoughs the film Beavis and Butt-head do America
Beavis and Butt-Head - 1993 Beavis and Butt-head's Island 4-16 was released on: USA: 28 April 1994
Beavis and Butt-Head - 1993 The Future of Beavis and Butt-head 7-35 was released on: USA: 18 November 1997
The long stringy stuff coming from your cats butt is probably worms. To treat this take your cat to the vet.