Most Helpful Guy
I'm with you on this issue. When they became an ex, they should have been unfriended. I can only think of one compelling reason to keep an ex as a friend on Facebook, and that is to keep open the avenues of possibly reuniting. If you can't resolve this issue now, you need to drop him. Can you imagine being married to him and he still corresponds with exes on Facebook?
Most Helpful Girl
what kind of things does he comment on their pics? & theirs on his? it seems shady to me, I wouldn't like it either