You don't need sugar or honey to bake great bread, but if you add a bit it gives the yeast a little boost. If I'm leaving my bread to do it's first rise overnight (creating the 'sponge' some people call it), I add a bit of sugar and use cold water. If I forget to start it off on the night and have to start it in a morning and want to get it baked asap, I use honey instead (about the same amount), and use warm water. Maybe I'm being daft, but it seems to work. Perhaps it's just the temperature that makes the difference
Edited my own bad grammer. I noticed I'd used the wrong word and it was really bugging me, lol