Class Trematoda: Infect the internal organs of hosts. Parasitic Can be endoparasites (live in the host) or ectoparasites (attach to external surfaces of the host. Size: ~ 1 cm to 10 cm Covered in an unciliated cuticle. Usually require 2 hosts to complete it's life cycle.
Warts are generally caused by a human virus known as papilloma while moles are generally related with age and caused by hormones and environmental factors. There are cases when kids are born with moles but in general moles on the face increase with increase in age.
Wart on your finger? Wart on your penis? They're both warts so they must have the same treatment, right? Unfortunately, they don't and for one very major reason: the skin tissue on other parts of your body (hands and feet, for example) is much less sensitive than genital tissue.