Take 3 feet of PVC pipe then coat the inside in body temperature lube (96.8 degrees) then slide your penis into the pipe. After that get a partner to insert a cockroach into the other end of the pipe and to blow the insect to the end of your tube with your penis and allow the cockroach to crawl around. Optional: have your partner suck the cockroach out at the end.
Someone or something that bites your ankles.
To a postman, an ankle biter is often known as a dog.
To an adult, an ankle biter may be a toddler.
To hikers, an ankle biter is sometimes a tick.
And so on.