A little while into the visit your friend asks you if you'd like something to eat. You can't shake your head no fast enough.
You feel your skin crawl because you can just imagine what nasty furry creatures are crawling around under the pile of crap on the floor next to the TV on your left.
10 mins into the visit you can't take it anymore and make excuses and bolt for the front door to make your escape.
Has this ever happened to you? Yeah, me either.