August 2012 file photo shows Hempfest attendee smoking marijuana from glass bong

... 23,000 people underwent surgery to correct the condition. According to the American Society for Aesthetic Plastic Surgery (ASAPS), it was the fifth-most common cosmetic surgery in men. Gynecomastia is caused by a hormone imbalance between ...

http://www.wtsp.com/news/national/article/347402/81/Does-smoking-pot-cause-man-boobs