I feel safe and comfortable to do that once I know that the song structure around the bass part is very interesting and it satisfies me in a compositional sense.
In a way it costs thousands dollars before you could actually go out to put the show on because you'll need equipments, all the lights you know, and that's more just going out and playing you know.
I don't like to get too specific about lyrics. It places limitations on them, and spoils the listeners' interpretation.

