do what you do do well

A off wife was complaining about her husband spending all his time at the bar, so one night he took her along.
"What'll ya have?" he asked.
"Oh, I don't know. The same as you I suppose," she replied.
So the husband ordered a couple of Jack Daniel's and threw his down in one go. His wife watched him, then took a sip from her glass and immediately spat it out.
"Yuck, it's nasty poison!" she spluttered. "I don't know how you can drink this stuff!"
"Well, there you go," cried the husband. "And you think I'm out enjoying myself every night!"