Undead Lords would always have some strange habits. The stronger and older the undead, the more this would be true. Even undead would need hobbies to help pass the endless years. As time passed, causing past memories to become fragmented and new memories to become messy, it was only normal for an undead's personality to become somewhat unusual.
"Is this another way of saying that being too isolated will turn you into a pervert? This really is rather convincing, old perverted Roland."
"Shut up, silly cat. How about we calculate the difference in age between us and see who's really the old and perverted one... alright, please put down that innocent eggplant."