Refraining from having sex with a female while you are both suffering from the effects of overindulgence in alcohol. Most cases like that are usually described as brewer’s droop or beerdick. Perhaps the person who came up with the idea that this is down to morals, ethics or willpower should remember the old saying a standing cock has no conscience and leave the bullshit to the politicians.
“Sally and I got ratassed last night; she was gagging for it, but I didn’t do anything.”
“Drunk chivalry?”
“Nah, brewer’s droop.”