Does your friend realize that his actions impact his life or is he fine with them? I guess what I am saying is, does his OCD get in the way of living his life? If so, then therapy may help.

I think growing up poor had a lasting impact on me. I have a box of crayons, 64 colors unused that I have had since childhood. I won't let anyone use them. I have raised 2 children and have not allowed them to use the crayons let alone touch them. They just sit there, and have for more than 40 years! I also will not eat the last of anything. I can't count the number of food items that I throw away because I didn't want to consume the last piece of cake for example.

Neither of these things bother me though, so I would not seek therapy for them.