Blonde joke.
Mary and 2 boys were walking back home after a long day at school.
One of the boys says "Mary, if you can climb up that lamp post and touch the glass we'll buy you an ice-cream."
"Umm i dunno. Do you promise too?"
"Of course. But you must touch the glass on the lamp pole."
So Mary mary climbed up and touched it. The two boys stuck to their word and bought her the most expensive ice-cream at the milk bar.
Mary got home and was still licking her ice-cream.
Her mother saw her and said "Where did you get that from Mary?"
"Two boys told me to climb up a lamp post and touch the top. So i did and they bought me an ice-cream." she replied.
"How silly of you Mary, they just wanted to have a look at your underwear as you climbed." her mother said.
"Of course i knew that. But i'm clever mummy. I took my underwear off before i climbed."