From Wikipedia--Formicophilia, a form of zoophilia, is the sexual interest in being crawled upon or nibbled by small insects, such as ants.This paraphilia often involves the application of insects to the genitals, but other areas of the body may also be the focus. The desired effect may be a tickling or stinging sensation, or the infliction of psychological distress on another person.
My mind is unable to comprehend the enjoyment of this one. I smash anything that dares to crawl on me as soon as I'm aware of it.
Have a great Tuesday. I hope no tiny spiders drop on you today (especially in great numbers) unless of course that's what you want. :)