Reading another thread I realised that due to my upbringing, it would never occur to me to take wine/flowers to someone's house if they were hosting. (That said, I often offer to cook for us all and take it with me ready prepared, or if it's a whole evening thing where drinking will happen I do always buy more wine than I could possibly drink myself)
It got me wondering how many other unwritten rules I don't know. I'm not concerned that people think I'm rude particularly as all my friends know I would (and often do) do anything to help them out but I realise now that strangers wouldn't know this.
So help me out please oh wise mumsnetters!