~time to explain the joke~
The query sent in to the show there was a troll, but might as well have been legit - people do, sadly, write in to The 700 Club with that sort of thing all the time.
The reference is to Undertale, wherein the character Sans is a lazy but good-natured skeleton "monster" in a hoodie and also some sort of retired quantum scientist and/or Time Cop. He keeps an eye on the player character and tries to lead them down a friendly and nonviolent path. At the end of the game, he appears and lectures the player on their choices, but refuses to fight or harm them, even if they've been a violent jerkface. Unless you've gone completely genocidal, murdered literally every other character in the game, ground randoms into dust until everything everywhere is dead, and are threatening to go on and murder the whole world. Then he reluctantly opens the glowing eye and smacks you with a boss fight vastly more difficult than anything else in the game, as referred to by his dry catchphrase, "You're gonna have a bad time."
The ensuing segment is ridiculous, hilarious and heartwrenching, because Undertale is a game that explicitly promotes nonviolence, tolerance of others, and rejection of greed and anger. And Sans specifically is the character who most epitomizes and lives by those values. He is almost exactly the sort of role model Pat Robertson would like kids to have, if he knew about the game, or approved of games in general, or was down with tolerance of others.
Also, for some reason, Sans is perceived as incredibly attractive by the youngish female fanfiction-and-tumblr demographic. Like a huge proportion of Undertale fanfiction so far is Sans x (usually nameless) self insert female romance, and/or "romance," if you get my drift. So the final line "How do I help my daughter not be attracted to such demonic things?"... yeah, that was intentional.
~explaining the joke~
