I JUST CREATED A THEORY!!!
So hear me out, Black Widow or formally known as Natalia Alianovna Romanova has an iconic symbol of an hourglass. The Marvel industry decided to make it that as the Black Widow spider has one on its abdomen but I have a better reason.
Think of it like this, Black Widow says see you in a minute in Endgame (Sorry if you haven't seen it). And majority of hourglasses usually last a minute to transfer sand from one side to the other. Well what if this was Marvels way to tell us that Nats time is up.
It's almost as though she has an endless hourglass cycle turning it just before it fully transfers, like every time she is hurt or close to death. Maybe when she says "see you in a minute" the hourglass realises that it's her time and let's the sand fully transfer.
I know it's a crazy theory but I was discussing it with maia and I feel like it could actually make sense. And out of all symbols they choose the hourglass rather than the spider itself. I understand that they may say but then it clashes with spiderman but wrong, his spider is different therfore it wouldn't clash.
So that's my theory, if you have any of your own or want to agree or disagree with this then go ahead and comment below.
Love yall, cheyanne