Someone close to me has gynecomastia is there any way to get rid of it?

Someone really close to me has this conditon, it hurts me because I want him to be able to hang out when we go to the pool. His " man boobs" aren't overly large, however he thinks their bigger than what they are. I feel soo sorry for him because it's embarrasing! Please any comments, suggestions? We dont want to take the route of cosmetic surgery, something natural please( : Thankss!