sex activity vs delicate

sex activity is a noun but delicate is not a noun.

Word	Noun	Adjective	Verb	Adverb
sex activity	Yes	No	No	No
delicate	No	Yes	No	No

sex activity (noun)	delicate (noun)
activities associated with sexual intercourse

sex activity (adjective)	delicate (adjective)
	exquisitely fine and subtle and pleasing; susceptible to injury
	easily broken or damaged or destroyed
	difficult to handle; requiring great tact
	developed with extreme delicacy and subtlety
	of an instrument or device; capable of registering minute differences or changes precisely
	marked by great skill especially in meticulous technique
	easily hurt