The Praying mantis is a super freaky looking bug with some very interesting sexual predilections. For instance, cannibalism.
Some female Mantis species bite the head off the male Mantis after he deposits his sperm in her. After is the important part to remember while watching this video from Youtube channel Deep Impact. At about the three minute 30 second mark, you will witness a male mantis getting its head bite off—and still being DTF afterwards.
As you can see, he has no head. Yet he persists.