Why are people offended by their partner liking someone photo? If he or she comments something flirtatious then I can see where it draws the line but a "like" isn't even verbal.

Pssshh. My wife will like the photo and make the flirtatious comment without a second thought, lol. The thing is, I fully trust her so I don't care that she does that and I know she won't do anything stupid and vice versa. It's all about trust, my friend.