I know this will sound awful, but I need to say it.
Old people should not be allowed to shop at grocery stores. 
Or kids, but not for the reasons stated below.
Old people and kids obliviously meander in the aisles. You try and pass them on the right, and they meander directly in your way, so you move to the left, and they do too. After this happens 4-5 times, you finally cough and say, “Excuse me!” Just to have them stop dead and look at you perplexed as to where you came from. ‘I’ve been trying to get by you for the last 10 minutes!’
Kroger always has some kind of 5 for $5 or discounted items you can buy 5 of. Old people do not understand you have to load the coupons onto your card from their website or their app. So when they get these things they always complain they don't get the discount even though there's a sign that clearly tells you what to do. They'll stand there for ten minutes arguing and not understanding. I'm not trying to be mean but they just don't understand. I waited ten fucking minutes yesterday waiting on an old couple to figure it out. I couldn't go anywhere else because the self checkouts were all full up and no other lanes were open. The baby Latina was even getting sick of waiting. This isn't even the first time this has happened to me. If I don't get stuck behind the elderly who don't know what apps and digital coupons are, I get stuck behind elderly who pay down to the last penny. I have nothing against old people. I hope to live to be old. But there's gotta be a line drawn somewhere. They're just too fucking old to be out doing things. It wasn't that long ago a very elderly woman slammed a moterized shopping cart into the door trapping people behind her. No, she actually backed up and rammed the fucker again. 

OK, fairly certain that would completely befuddle this 56 year old too. The difference being I will starve before I use coupons. Coupons are for crap food I never buy. If they issued coupons for fresh meat, vegetables and fruit, I would use them, but it’s always some box of crap I would never eat. The rare coupon for something like toothpaste I might save expires long before I need toothpaste. And, I would never bother with any kind of e-coupon; again, rather starve than try and figure it out.
Great way to avoid the elderly in line is I use the self checkout. There’s 6 of them, and the elderly can’t block them all trying to figure things out, although they often try.