Rude isn't the word. Infuriating & frustrating are better. DH sees an aquaintance, client or his parents friend from 20 years ago & stops to chat for 20 minutes to be polite. I'm left wrangling bored kids. DH ends up taking kids back to the car while I bolt in/out of shops because they've had enough & he calls it 'me getting to shop in peace' like it's a favour.

It's additionally infuriating because he is non social at parties & sits in the corner with resting bastard face or falls asleep. Sigh.

This sounds similar to a point of tension with my husband & myself but it's more about leaving other people waiting. My husband has zero care factor when it comes to leaving myself or anyone else waiting while he has a really long conversation or does anything else for that matter & drives me nuts because I hate to have people waiting for for me. I think it's so rude. I always have a quick chat & say "oh I better go we're in the middle of shopping" but not him nope chats away like there's no one else there & nothing else to do. I get it.

It's not rude to have a conversation. It's also not rude to politely excuse yourself so you can do your shopping.