I have finded some funny humour just now, so I post it here in time:
Doctor: I'm sorry to tell you,but you have rabies.
Patient : Quick,give me a pencil and paper.
Doctor : Do you want to write your will?
Patient : No,I want to make a list of all the people I intend to bite.
A: No teacher is stricter than Mrs.Hauser.Good luck,you didn't have her class.
B : But she is my Mom.
Young snake : Are we poisonous?
Mother snake : Yes,dear.Why do you ask?
Young snake : Because I've just bitten my tongue.