Spur of the moment quips

So, I was out helping someone with their purchase of a replacement computer, today, and they were almost completely convinced that they wanted a Mac (one of the 24" combined ones). Now I'm easy with this. But the sales guy blerted out (in a rather smug way) that Macs don't viruses, and are intrinsicly secure.

After a short pause, responded, " yeah, and men don't get raped all that often...". I did apologise, a few seconds later. But I'm starting to get flash-backs, and smirking...*[A]

Anybody care to share similar quips ?