having or demonstrating ability to recognize or draw fine distinctions; "an acute observer of politics and politicians"; "incisive comments"; "icy knifelike reasoning"; "as sharp and incisive as the stroke of a fang"; "penetrating insight"; "frequent penetrative observations"
If a man has penetrative sex with someone, he inserts his penis into his partner's vagina or anus
tending to penetrate; having the power of entering or piercing; "a toxic penetrative spray applied to the surface"; "a cold penetrating wind"; "a penetrating odor"
Having the power to affect or impress the mind or heart; impressive; as, penetrative shame
Non-penetrative sex (also known as outercourse) is sexual activity without vaginal, anal, and possibly oral penetration, as opposed to intercourse. The terms Mutual masturbation and Frottage are also used, but with slightly different emphases. NPS and outercourse are rather new, not generally accepted terms, which is why some subsumed practices usually are still called "intercourse"