Campsite rule 

coined by dan savage, in relationships with a large age disparity, at the end of the relationship, the elder partner should leave the younger in "better shape than they found them". This includes no diseases, no fertilized eggs, no undue emotional trauma, and whatever education that can be provided.

i wish that my older boyfriend would have observed the campsite rule with me, now i have a broken heart and a monthly prescription for valtrex.

Campsite rule by busyscissors June 10, 2011

Campsite Rule 

An old rule for campers. “Leave the campsite better than you found it.” Many also apply it to other parts of their lives.

Jack: Thanks for filling up my tank after you borrowed my car last week.
Anna: No problem. I always follow the campsite rule.

Campsite Rule by It’sme,yaboy October 30, 2019