Here's an interesting perspective from Professor John Money:
p. 4:
If there were a single
term with which to denote the sexology of homosexuality,
heterosexuality, and bisexuality, that would be the term for the title
of this book, for the understanding and explanation of any one of the
three applies to the other two as well. Homosexology fails to qualify
as signifying the sexology of mankind, for according to its other
etymology it signifies also the sexology of same-sexed partners, that
is of homosexuals. The term sexology itself fails to qualify, as its
meaning is already established as encompassing more than the science of
sexual orientation as homo-, hetero-, or bisexual.
p. 5:
One way around this
terminological impasse would be to have a word like fuckology, used in
everyday, vernacular English to signify the science of what it is that
people actually do under the cover of polite expreissions like making
love or having sex. ...
By John Money, pp. 4-6, in Gay, Straight and In-Between: The Sexology of Erotic Orientation. New York, NY: Oxford University Press. 1988.
John Money Concepts Of Determinism
John Money Lust Love Paraphilia
John Money Paraphilia Hypophilia Hyperphilia
John Money Single Term Sexology