LOL! I can drink a cup of coffee before going to bed and have no problem sleeping. Drinking coffee has a calming effect on me. It does keep me regular, though. I know, TMI.Ed, if I had 6 cups of coffee: 1 - would need depends, 2 - will be up for a week, 3- wife would put me out of house for a week, 4- could not literally hit broadside of barn at 25 yds, 5 could not hold cup without spilling it!