So when you’re a lich, and your body dies, and it’s early in the year so you’re not gonna respawn for like, a while, and you miss eating food and sleeping and stuff…
And your SO is also a lich, so like, they get it… it would eventually just be common courtesy to scooch over a bit in the ol’ flesh vessel and let them possess you for a bit and chill right?? This is what normal couples do