I imagine that one's lungs (& all else irrelevant per joke set-up) would get crushed pretty good in a wormhole. This is a very polite and discrete excuse to give someone as to why not laughing at their lame joke, assuming joke-teller has a proper education. So though I can appreciate discretion I can also see through, so let's dispense with all the feelings-sparing, shall we?
you should link yourself to wackbag.