You'll drink the cheapest of beer and nastiest of tequila with your friends, but if you want to impress a lady (who doesn't attend Alcoholics Anonymous meetups), you're gonna need to know about Merlot, Chianti, Pinot Noir and other fermented grape juices.
However, you can't swirl and sniff wine if you can't manage to open the bottle. Every guy should know how to use a corkscrew -- that's some entry-level Guy Code -- because the waiter at a fancy restaurant (probably) won't follow you and your date home.
It takes practice, though, and some guys might attempt to use other household items. You know, like a katana, a rocket, a pistol, a chainsaw...just stuff lying around the den, if you're like the hilarious lunatic in the below video. Don't try any of this s**t at home, except maybe for rocking those American flag boxer-briefs: