... come into your home.  That's a basic rule for outcall safety, and this guy took a risk that obviously jumped up and bit him.

This could have happened from lots of places, though CL is certainly one place that lends itself to this sort of thing.  Be careful, and look for well-reviewed providers.  There are many different ways you can wind up "Taking One For The Team", after all.

CL is the biggest gathering of human waste on the planet (not just providers..in general..). For the 20 percent of what may be legitimate, it ain't worth it. It's like EBAY without the moderation.