An American tourist goes on a trip to China. While in China, he is very sexually promiscuous and does not use a condom all the time.
A week after arriving back home in the States, he wakes one morning to find his penis covered with bright green and purple bumps.
Horrified, he immediately goes to see a doctor. The doctor, never having seen anything like it, orders some tests and tells the man to return in two days.
The man returns in a couple of days and the doctor says:
"What, cut you dick off "!!! The Chinese doctor shakes his head and laughs:
"Stupid Amelican docta, always want to opelate. Make more money, that way. No need to opelate!".
"Yes", says the Chinese doctor, "You no worry!
Wait two weeks, fall off by itself!
You save money!"