What would be the reason for you to keep an ex's number unblocked if you didn't want to get back together with them?

I only block numbers of exes who are likely to call and bother me. I assume that exes won't continue to contact me after a break up and almost all of them leave me alone. However, I recently phoned an ex (dated 2015-2017) to give her some important information about a mutual acquaintance. Prior to that call, I hadn't spoken to her in 4 years.
I would only block if I were being harassed , stalked etc , I have had to go this ,
but generally I would not bother blocking , no need to block.
I think what @olderandwiser is a good answer if I had an ex like that I would block their number too. I only had one ex boyfriend and I just deleted his number after a couple months because I didn't feel the need to block him and he wasn't the harassment/stalker type. I haven't spoken to him since our breakup.
If you guys broke up on good terms.
No reason to block.
Opinion
7Opinion
A. If we broke up just once, then I'll be Thinking that he may have changed and become the same sweet person he once was.
B. If he repeats the same mistake after patching up from the breakup then , you breakup again ( means you break up the second time ) , then I would keep his number and leave all the chats on blue ticks or read hahaaha to give him pain lol.
C. Related to point B, would play block unblock games ;) and wouldn't reply at all or reply in emojis and also cut calls abruptly and not leaving calls on missed calls.
Haha this is how you should teach the man your worth, if he takes you for granted. Remember - you're the queen and you should be treated the best ❤️
No one knows what the days will bring
I may need his help with something that only him can help me with
Or he might need my help and I'd be happy to help
Yes things didn't work out between us but it doesn't mean that we're enemies
He wasn't being annoying, so I had no reason why to block him. The one who was being annoying is definitely on my block list though.
I don't block numbers unless they harass me, don't see a reason to.
Probably don’t care enough. Like I have enough willpower to ignore them.
Why block them at all unless they treated you badly
There’s always a reason It’s a back up quarterback plan
Some ex's, work together
But is not something I think they should do
THATS WHY I ALWAYS SAY DO NOT DATE COWORKERS
It's like saying you're always ready to be friends if they wanted to. You can use that in future arguments and what all. It's great.
He's the father of my kid lol
So you know its them and don't answer
Hit her up for sex.
I imagine that there is always hope
Superb Opinion