Merriam-Webster 's Dictionary described heterosexuality as an unhealthy sexual passion for the opposite sex .
`` The abstract noun `` '' heterosexuality '' '' is first recorded in 1900.p.22 , Mills The word `` '' heterosexual '' '' was first listed in Merriam-Webster 's New International Dictionary as a medical term for `` '' morbid sexual passion for one of the opposite sex '' '' ; however , in 1934 in their Second Edition Unabridged it is defined as a `` '' manifestation of sexual passion for one of the opposite sex ; normal sexuality '' '' . ( ``
Heterosexuality