Pest: Fabulice (Patreon)

"Ehm, Falnos... Yer hair is lookin' mighty tall. Might that make stealth a wee bit challenging?"
"I have no idea what you mean, Tormir. I am simply expressing an interest in taking care of my hair these days."
"Aye, aye... And the clothes? A bit scant for a dungeon, no?"
"These are traditional summer elf traversal garments, obviously. Perhaps you'd like them in a pile next to your bedroll, master dwarf?"
" *gulp* "

Fabulice:

One of the most bizarre magical parasites, Fabulice make their home in the hair of male adventurers. They feed on their host's testosterone and replace it with a chemical cocktail of estrogen, keratin, and a poison with a mild charm effect. These pests perpetuate their lifecycle through subtle hypnotic suggestion to the host via each bite. The afflicted will be compelled to grow out their hair in order to provide more space for eggs. They will also be compelled to collect semen by any means necessary in order to cement the eggs into the hair. This usually results in the host wearing more provocative outfits to attract semen carriers for sexual intercourse. During this process the Fabulice may spread to the sexual partner who  will continue the lifecycle elsewhere. After days of fucking and sucking, the afflicted's hair usually ends up in a massive beehive or bouffant on top of their head, as they push their lengthening hair up to construct more layers for more eggs.

In the worst of cases the hair nest eventually becomes too heavy and the Fabulice will produce a queen. The queen will swiftly grow to fill the space of the hair nest, devouring her way through hair and fabulice alike. Then she will hatch from the adventurer's scalp and escape deeper into the dungeon to perpetuate her lineage. This leaves the former afflicted now lice-free, but usually with a significant bald spot and a sore jaw.