Sorry, but I just would never say ‘me and Dave are going to X’.
I would always say ‘Dave and I are going…’.
What on earth is wrong with ‘Dave and I’??
It just wouldn’t occur to me to say ‘me and Dave are going/doing’, because it’s wrong.
I don’t really refer to ‘Dave and I’ very often - I would usually just say ‘I am…’ or ‘we are going…’, so perhaps because I’m not including the dreaded Dave in my sentence, I get a pass from your bizarrely chippy sneeriness?
I’m not ‘posh’. I’m an Antipodean who was brought up to speak, and was taught, English. This isn’t some medal-worthy achievement. It was just … normal. This sort of basic sentence structure was taught in the first years of primary as well (and reinforced (modelled) at home) - a point at which literally everyone had access to the learning.
Somehow, we’ve reached a point where this is something to be ashamed of, and we must speak in a contrived, incorrect way, so as not to offend people who don’t speak properly?