Why in a movie or TV show when someone dies, someone always has to touch the blood?

cringeworthy

maybe to check if it is fresh or not
maybe the perb is in the closet
they have to be ready

I dont know, do they?

Don't ever seem to show the folks having to mop up the blood.

It's for dramatic effect.Its always great when they sniff it like they are an Indian tracker,or something.

That's sickening.