That's a weird one, isn't it? I've heard of giants riding dragons as a strange result of having one too many mods installed, and seen a person who somehow managed to mod their game in such a way that guards simply stopped wearing clothes. 'I've only just started experimenting with mods today for a laugh, to come to the realization that when I have loaded up my game, some of the characters do not have any eyes. That's pretty much exactly what happened to a user called Camjdent on Reddit. Whether said mods conflict with a necessary narrative aspect of the game or simply render certain errors that lead to absolutely ridiculous bugs, modding your game invokes an inherent risk of absolutely breaking it. Loading mods wrong can have a range of effects on how Skyrim actually plays out. Apparently loading your Skyrim mods incorrectly can potentially change the Dovahkiin simulator into a game where there is no such thing as eyeballs anymore.