I can't speak to what's going on inside your head, but I think people trick themselves into playing those few extra minutes all the time. I know I do:
- "I've got plenty of time. A few extra minutes won't hurt."
- "I didn't really need to get that done today anyway."
- "If I stay focused I can catch up."
- "If I blow off some steam now I'll be able to focus better later."
- "I can do this and watch the big game at the same time."