1 - Why do the not allow chalk on the rail. Chalk in your pocket is nasty. Not only does your pocket get full of chalk which is a problem doing laundry but he runs through the pocket onto your leg. I wash the chalk off my hands when I'm done. Snooker player wash it off the hands and their leg. Why would they make a goofy rule like that?
2 - Why do snooker players drag the butt of the cue around the table on the floor? The butt of the cue picks up whatever anybody brought into the pool hall on the soles of their shoes from outdoors. When they grip the cue it transfers to their hand. Blue chalk on their leg, dog **** on their hand.
1. I just like lining up and chalking without having to step back in to put the chalk back on the rail. It's not a big deal, but I guess it's just habit.
2. Learned behaviour. You see other good players do it, so you do it too. Nothing to do with energy consumption. A healthy person shouldn't struggle to carry a 16-18 ounce cue for 2-4 hours.