Spanning the language divide on the subject of technology and aqueous substances

We are talking computers with our friends, one of who is desperately computer-illiterate. Let's just call her A (because her name starts with 'A'. How diabolically clever of me!) Adam (bragging): You've got to get yours set up with a water cooling system. A: Huh? Adam: Water cooling. So there's no need for fans. A: What? Adam: It makes the computer quieter. A: So where does the water come out? Adam (confused): It...like...doesn't... Karen (cottoning on to where the language was failing the communication process): A, the water cooling he's talking about isn't the kind you drink from. We all sigh in relief.