Man A: *watching porn*: Dude I've seen those tittes somewhere before.
Man B: What do you mean man?
Man A: Dude I have a phototitic memory, I never forget a pair of tits. Those belong to my ex girlfriend Laquisha.
The act of stopping picture trades with a person namingly because a person loss interest after seeing what they look like. Usually occurs after initially messaging a person and seeing closeups. See ghost chat.
Marissa: So I was talking to this guy the other day and he photoditched me after we agreed to swap pictures and I shared a few of them.
Jordan: That's rude, I think he only wanted to see you naked.