"Climcing The Tree For Money$" joke

One day Little Sally, may i tell you who always LOVES to wear dresses came running home and with excitement told her mom, "These boys at school said they wold give me $5 to climb up the tree!"
Surprized her mom asked, "and did you do it?"
"No but if they ask tommorow i think i will!"
"Dont do it all they want to do is see your underpants!"
"ok" Little Sally replied.
This continued for the next few weeks and each day the boys promised to raise the price.
One day Sally came running home crying.
Her mom asked what was wrong.
"When i was at school today i climbed the tree for $100! But when i climbed back down they laghed and ran away!"
"Well i told you not to do it all they want to do i see your underpant!"
"But mommy im not wearing any underpants!!"