You're proven wrong by idiots using words in the wrong way. I have never, in all my life heard any one use "making out" when refering to sex no matter how sober, drunk, stoned, stupid or confused they have been.
And "hook up"? Maybe it's different in the wacky world you live in, but that generally refers to the making out and groping and arms around each other that occurs between two people, often drunk and sometimes LEADING to sex. Not the act of sex itself.