sex vs piece of ass

sex and piece of ass both are nouns.

Word	Noun	Adjective	Verb	Adverb
sex	Yes	No	Yes	No
piece of ass	Yes	No	No	No

sex (noun)	piece of ass (noun)
activities associated with sexual intercourse	slang for 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

sex (verb)	piece of ass (verb)
tell the sex (of young chickens)
to evoke sexual feelings