Where did I read this quote ?
"Wherever your relationship is headed, you'll get there faster on a tandem."

Sports that require focus are great for clearing your head and reducing stress. The day may have been crap, but the ride accomplishes something good for you. I really like bike commuting as a nice way to decompress after a rough day at work. At home after riding I am often grateful to have time to just relax and do whatever I want to do (translate: do NOTHING).