Turns out the long, mystery hair belongs to Husband’s friend “Dave.”

OP has deemed her husband’s gas lighting and lying about the source of the hairs to be acceptable because Dave would be too “embarrassed” if she knew he had lost his job, etc. because of the Pandemic and that he was having to come over almost daily to shower for interviews.

https://i.imgur.com/IryR7oU.jpg

Edit: photo re-upload