I understand that this is a joke and I'm not saying it's wrong you posted it or anything, but fans are allowed to do what they enjoy. NSFW artists can have some fun with their favorite characters and do I really have to say that he's a FICTIONAL SKELETON? Yes I do. He can have/do whatever he wants because logic doesn't exactly... y'know, apply. Kinda hurts seeing all the comments of people thinking it's SOOOOO bad that people make Sans hentai and stuff.