Lots of reasons this might be, perhaps he wasn't comfortable with the level of photos that his exes took and decided this time to assert himself a bit more, maybe there is an ulterior motive and he's up to no good or maybe he's trying to head off potential issues from a third party if they see them, plenty of ex nutters about. I must admit that Mr Cal and I don't have that many pics together compared to some people, it's not that unusual, so unless you think there is a dark reason I wouldn't worry about it x