The scourge of New York City subway-riders is now afflicting late-night couches. That’s right, manspreading: the male habit of spreading one’s legs wide apart while seated in an effort to convey the idea that the spreader has very large testicles. Well, Conan O’Brien isn’t going to have any of it. Not on his couch! So close your damn legs, D’Elia. This is a family show.