I would walk 100 miles, and I would walk 100 more...
Ariakas: the 100 mile rule (as I've seen it) is a rule where once you're a certain distance from home, on a business trip for example, then it's not cheating to have a sexual-- or even potentially a romantic-- encounter.
It's not for me, but I have a friend who's opening her relationship in that direction, so she can make a road trip to visit a friend guilt-free. (They're further down the open relationship spectrum than a lot of couples I know, but they still call themselves monogamous.)
"I was thorough when I looked for you, and I feel justified lying in your arms." - Chasing Amy