Replying to sibling, as nesting level reached:

This is a wonderful example of why human communication isn't only based on the semantic meaning of words. Flirting, sarcasm, irony - all would be lost to someone just parsing words, not being able to understand the finer communication on a subconscious level: Body language, rapport, etc.

I wouldn't be surprised if people who would call someone out on that language have a higher chance on being diagnosed with autism or sociopathy - which in itself isn't bad at all, but it helpts being aware that communication between humans is apparently perceived completely differently by different groups.