Generally, I find that if the behavior is fitness-maximizing (seeking social interaction, sex, food, etc), I think of it as "evolution programmed me", whereas in the case of things that are not obviously fitness-maximizing (finding interesting puzzles/challenges, building things, playing guitar, etc), I think of it as "I have an inclination to X". It might actually also have to do with whether most people have similar urges as well, now that I think about it.