(a) No person who is eighteen years of age or older shall engage in sexual conduct with another, who is not the spouse of the offender, when the offender knows such other person is thirteen years of age or older but less than sixteen years of age, or the offender is reckless in that regard.
(b) Whoever violates this section is guilty of corruption of a minor, a misdemeanor of the first degree, provided the offender is less than four years older than the other person.