When should someone delete their photos of exes?

I noticed my boyfriend still has pictures of his ex from 7 years ago on his FB- she is married now. When i break things off I dont keep pics or anything of them... when do guys normally delete old pics...
PS: I know guys are different and dont fuss over silly old pics etc but do they just keep them forever? its kinda weird
So by when do you think a guy should eventually take the time to delete old pics.

Updates
+1 y
Reading all these comments shows how different we all are. Some , like myself, like to delete to make room for better memories, and others like to keep the good memories or dont really care to delete. Interesting, I dont think there is a right answer and we all deal with things the way we do.
Thanks for the comments guys and girls :-)
When should someone delete their photos of exes?
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