do the deed
1. To perform or undertake any given action, usually implied to be unpleasant, unsavory, or illegal. I couldn't stand the idea of watching them put down my pet dog, so John went alone to do the deed. The mob boss waited to hear whether the assassin he'd hired had done the deed.
2. slang To have sexual intercourse. Teenagers are under a huge amount of pressure from their peers to do the deed before they feel ready or really want to.
No good deed goes unpunished.
Due to the cruelty, ignorance, or selfishness of the world or others, one's good deeds or good intentions will often result in more trouble than they are worth. An ironic and sardonic twist on the more standard moral that "no good deed goes unrewarded." Janet: "I decided to help George clean out his gutters, but now he's got me doing all sorts of repairs around the house!" Bill: "I guess no good deed goes unpunished, eh?"
no good deed ever goes unpunished
Due to the cruelty, ignorance, or selfishness of the world or others, one's good deeds or good intentions will often result in more trouble than they are worth. An ironic and sardonic twist on the more standard moral that "no good deed goes unrewarded." Janet: "I decided to help George clean out his gutters, but now he's got me doing all sorts of repairs around the house!" Bill: "I guess no good deed ever goes unpunished, eh?"