Seemed like a good idea at the time

a valid excuse for a really bad mistake, can only be used once

Wife: I cant believe you had sex with those two strippers, then you had the nerve to bring them to the house and make them breakfast.

Husband: Seemed like a good idea at the time.

Wife: I bet it did, it was a bad idea and you are a ass hole for thing it was

Husband: Well, that did not cross my mind at the time. I never banged to hot bitches at the same time and two bitches at the same time is always a good idea.

Rumored to be what Bill Clinton said when asked about Monica Lewinsky during his 1999 impeachment hearing.