The work my mum does, a lot of it is re-housing homeless people, that's a real job. I play make-believe and dressing up for a living!
I have definitely written a happy song about someone and then we ended up splitting up, but you have to put those kind of things to the back of your mind and tell yourself that it's a good song and it works on the album.
You don't underestimate either players or audience in any circumstances.