Redditist:
A young blonde woman gets a job as the physical education teacher at a school.
On the first day she has the kids outside playing in a field.
After a little while she notices one young boy standing all by himself while all the others are running around together.
She walks over to the boy and asks, "Is everything OK with you?"
The boy says, "Yeah, I'm doing just fine."
Taking pity on him, the blonde says, "You know you can run around with the other children too, right?"
Shrugging, the boy tells her, "I think it's best if I just stay right here."
The blonde asks, "And why would you say that, sweetheart?"
The boy says, "Because I'm the goalkeeper."