DELETE ALL THE THINGS...

keep nude ones for later use

Deleted + deleted from all social media and shit. I dont see a point in keeping that stuff just makes one sad :)

The only thing I've kept from my only relationship is a 3sec video of her smirking. Dunno, I just found that one rather captivating. I don't think it's right, though - I don't even wanna imagine what any future companion might think if they happen to stumble across such things.

I keep this kind of thing, because I can't even remember where I put it

For me it depends on the person and how things ended. I have some mementos (and racy photos lol) from one stashed away on a thumb drive that I don't really think about, and haven't for awhile until just now. We broke up because the timing of it all was not right and she just wasn't ready for it, which is not really a bad way for things to end in my experience. I may try looking her up again in the future and giving it another shot because we really seemed to have connection.... a better one would be my hope... so that's why I haven't just gotten rid of that stuff.

Depends how things ended. Personally haven't had any bad breakups or too much drama so I've kept everything, photos, gifts, memorabilia etc
There's no wrong or right answer though, it depends on the person. Some have an easier time moving on if they cut off every single tie and reminder, some are able to do it without that. If the issue is a jealous bf/gf though then most definitely nothing gets deleted/thrown away! Those relationships are a part of what made me who I am today and he/she will either have to deal with it or they're just not the right person.

I've never had pictures of an ex and never will :p I did have pictures of potential girls back in the day but I unfortunately deleted them. Would have liked to show my gf how cute one girl was :(

I've deleted them all at some point (yes, including the ( ͡° ͜ʖ ͡°) ones), but simply because I often delete old rubbish that I never use/look at.
I have very few pictures more recent than 2012, including photos of myself.
The ones I still have are in CD-ROMs so I can't really delete them - but the most useless CDs got binned anyway.

Im pretty sure i dont have a single picture of me and a girl in a near proximity in existence left D:

I have no ex, but I also have not much photos of my wife... I just don't need photo.
I don't believe them, it's mere images for taking place and collect dust.

The only thing I still own of my most recent ex is a picture of her dog because my mother really liked it. I miss the dog more than the girl xD

Is it not normal to save photos and skin samples so you can clone them in the future?

I tend to delete almost everything, you know, far from eyes far from heart
But, well, it doesn't matter, sometimes you can't really forget, yesterday I accidentally recreated her in dragon dogma :V

The right thing is to delete them, the human thing is to keep them forever and stalk their social accounts just to see what they're upto oh wow I had no idea those two were even interested in each other, oh I guess it's nothing serious, I wonder when they started going out, huh that's a long time, wait they have a cat??!? -____-
I mean delete them of course (｡◕‿◕｡)

I honestly delete everything, sometimes with a bit of regret. Problem is that perhaps it's me having difficulties to turn the page sometimes so I forge myself like in kinda everything in my life.
Once even forgot that I had the picture of my ex while I was with my girlfriend in France, I felt so bad with myself. That picture is probably somewhere there because I threw it away.
If you want to keep a memento it's different. I have items from my past relationships, but I think a picture is different.

Deleted most of them but new gf found them in an old backup. That was an interesting evening :)

Mostly not keeping them and when in doubt there's always room for a carton box in the attic. ;-)

Well, only have one ex-gf. For the moment I have kept most of the stuff (mainly gifts and maybe some pictures). But we did more or less break up on a good note. It just didn't work out due to the distance and some health and/or work related stuff. I think if I ever get a new gf I have to consider again what to do with it.

No matter how bad the relationship was, there must be some good memories. If you see the pictures and the first thought is something bad, delete them. But if the thought is positive one, keep the pictures.
Disclaimer: Don't take advice from me since I've never been in a relationship.

I do not keep those, no. But then again, I do not like keeping any sort of memorabilia.

I usually delete most pics of my ex, since it would be difficult to explain to my new partner why I have them. In my experience ladies are very pissed off when their BF has such pics, but if they have pics of their ex you must be ok with that because it's just "memories of someone they cared of". I might want to keep some moments that were special despiter her presence (ex. going with her at my relative's wedding).
Instead I hardly delete chat, i like it to be recorded despite I never go read again old discussions. One thing is to avoid watching stuff because you will forget faster, but it's different to pretend it never happened. Even the hardes relationships have a bunch of nice memories.

I keep them but not because I care about my past with someone else, but because I care about my history.

Regarding longer relationships: Keeping them, since they're part of my life. Flirts or whatsoever: deleting them shortly after.