He wears a beard, but it is not so much a peculiarity as a necessity, for there is not a mirror in the entire house. They do have one peculiarity which would mark them as odd in any community, if anyone knew about it, but it is of such a nature that no one else would know.
When they go to bed at night, before he turns out the light, he handcuffs one of his wrists to one of hers.