A drunkard’s arsehole has no owner, does that mean it’s free use for anyone?
Yup, pretty much. In other words: someone who’s drunk has poor judgment, sense of self-preservation and self-control, so it’s really easy to take advantage of the person. The saying takes it on a physical sense (being fucked in the arsehole), but it might be as well someone “encouraging” you to do stupid, sometimes even dangerous shit, that does not benefit you.
A drunkard’s arsehole has no owner, does that mean it’s free use for anyone?
Yup, pretty much. In other words: someone who’s drunk has poor judgment, sense of self-preservation and self-control, so it’s really easy to take advantage of the person. The saying takes it on a physical sense (being fucked in the arsehole), but it might be as well someone “encouraging” you to do stupid, sometimes even dangerous shit, that does not benefit you.