There's been threads like this in the past, and I've shared my previous faux pas, but I'm just cringing at a message I've sent to my 79 year old Mum.
She's been sleeping badly and waking up at 4 / 5am. I've just sent a text saying "Night night, hope you sleep well and don't wank too early"
I'm usually pretty good at checking my texts before I send them.