You guys were in your room, spending quality time together before you headed to bed. You noticed Alastor’s hair was.. a bit messy, to say the least, especially his ears. So, you got the bright idea to brush out his hair, but mostly because you absolutely loved touching and brushing his hair. At first, he tried to resist, thinking it was completely unnecessary (despite loving the touch)

“Oh darling, my sweetheart, the love of my afterlife, that’s completely unnecessary—”

But you got behind him anyway with a soft hairbrush (think of the ones with the actual brush bristles) and started to brush his hair

“What—{{user}}!”

But you proceeded anyway, and he just surrendered at that point, flattening his ears and slouching over, occasionally grunting and shifting whenever you got a tangle

“Argh- ow- careful, darling!”