A man walks into a bar and......

 

 A man walks into a bar and over the next couple of hours

proceeds to get increasingly drunk. Suddenly he spots a guy

in the corner with a group of friends and begins to verbally

abuse him.
"Oi you," he shouts, "I've shagged your mum!!"
The man carries on drinking trying to ignore the guy's drunken
rantings.
Half an hour later the drunk stands up and renews his abuse.
"Oi you," he shouts even louder this time, "I shagged your mum

up the bum!!"
The guy in the corner turns his back on him and continues talking
with friends although by now visibly irate.
Half a hour later the drunk pipes up once again.
"Oi you! your mum sucked my dick!!"
By now the guy in the corner has lost his cool, he stands up
furiously and yells,
"For fuck's sake Dad go home, you're embarrassing me". 

 J J