private parts vs sex

private parts and sex both are nouns.

Word	Noun	Adjective	Verb	Adverb
private parts	Yes	No	No	No
sex	Yes	No	Yes	No

private parts (noun)	sex (noun)
external sex organ	activities associated with sexual intercourse
	the properties that distinguish organisms on the basis of their reproductive roles
	all of the feelings resulting from the urge to gratify sexual impulses
	either of the two categories (male or female) into which most organisms are divided

private parts (verb)	sex (verb)
	tell the sex (of young chickens)
	to evoke sexual feelings