leiderlaus

Copulation in body lice, Pediculus humanus corporis (P. humanus and P. vestimenti in original). The male having dilated the vagina, has extruded his vesica with its distal penis into the vagina, and withdrawn the dilator whose point is flexed on his back. He is now firmly anchored by the teeth on the vesica adhering to the walls of the vagina, and the couple walk away to a retreat. This was drawn from hasty sketches subsequently amplified from killed specimens. - Wikimedia