This drives me insane. It's only my parents that do it (and my dad is the worst)
Conversation goes like this:
Me: "Would you like a cuppa?"
Dad: "Well, only if you're making one."
"I've just had one, but I can make you one"
"Well, only if it's not too much trouble"
"No, that's why I am offering"
"Well I'll have what you are having"
"I'm not having one, dad" (GRRRRRRRRRR)
"well, if there's a cup in the pot I'll have one"
"We don't use the pot dad, we make it in a cup"
"Well only if you're having one then"
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAARRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH