A 21-year-old wants to date a 15-year-old.
For those who are fuzzy on ability to consent and rape, it's simple: if someone cannot consent to sexual congress, then any penetration is rape. Reasons someone might not be able to consent:
- they person has been using drugs
- the person is not mentally able to consent (whether because of limited intellectual capacity or because of mental illness)
- the person is a goddamned child