sexual practice vs smutty

sexual practice is a noun but smutty is not a noun.

Word	Noun	Adjective	Verb	Adverb
sexual practice	Yes	No	No	No
smutty	No	Yes	No	No

sexual practice (noun)	smutty (noun)
activities associated with sexual intercourse

sexual practice (adjective)	smutty (adjective)
	soiled with dirt or soot
	characterized by obscenity