Dave apologizes to his wife, says the philandering is in the past and admits he's got his work cut out him. Dave believes you can't let the bad guys win, but he hurt a loved one in the process and for that, that he's sorry. 

Yet here is the "Top Ten Reasons I Got Married."

Undying love, not on the list.

Free cake...Yep.

Good a reason as any really.

After a 23-year courtship, David Letterman tied the knot with Regina Lasko at the Teton County courthouse in Choteau, Montana. Letterman, the self-described "last of the gunslingers," made the startling announcement on Monday...