Vaccination

[eaglefeather]

One day, Little Johnny visited a doctor for a
vaccination. After the doctor gave him an injection,
he tried to bandage Little Johnny's arm.

"I think you'd better bandage the other arm, doc!",
said Little Johnny.

"But, why? I'm supposed to bandage the injected part
of your arm to let your friends know not to touch
it."

"You really don't know anything about how my friends
behave!"