probably because of his telekenises powers or however you say it

i think it's funny how people can be attracted to fictional characters

Idk I guess they like skeletons more then an actual human :P

Sans is a blue hoodied short skeleton with the power of telekinesis, in a game called 'UnderTale' he has a very popular boss battle theme song, this battle occurs when you kill Sans's sibling, Papyrus. Yeah I dunno why

Some people yearn for love and don’t get the kind they want... this turns to them looking at fictional characters which they learn to love because that character fits their standards for love. Some people genuinely like Sans because they’re lonely. Other than that, they’re just trolling you.