Meet the skin mites that come out at night to have sex on your face and nipples...

[Mister Obvious]

Their reproductive organs have moved anteriorly, and males have a penis that protrudes upwards from the front of their body meaning they have to position themselves underneath the female when mating, and copulate as they both cling onto the human hair.

https://scitechdaily.com/microscopic-mit...humans/amp