So he's going on a diet. Because his mate doesn't like him so fat.
BANGKOK, Thailand - Chuang Chuang the Panda is just too heavy to have sex. Thai authorities have put him on a strict diet as part of a long-running campaign to get him to mate with female partner Lin Hui at the Chiang Mai Zoo in northern Thailand.
"Chuang Chuang is gaining weight too fast and we found Lin Hui is no longer comfortable with having sex with him," said the zoo's chief veterinarian, Kanika Limtrakul, adding that Chuang Chuang weighed 331 pounds while Lin Hui is only 253 pounds.
Humans to the rescue, once again.