As per western concept, unicorn had the body of a horse and a straight horn on its forehead. In Hinduism, the earliest representations o the unicorn are to be found on the seals of the Indus or Harappan Civilization on which it is depicted not with a straight horn but with a curved one.
In Indus seals, the generative organ is very prominently show and at front is a vessel which is generally identified as the fire receptacle, because in some specimens, sparks are seen coming out of it.
The unicorn is depicted in 1161 out of 1755 Indus Seals.
It is believed that the unicorn is attracted to virgins.