Statutory rape laws are based on the premise that an individual is legally incapable of consenting to sexual intercourse until that person reaches a certain age. The law mandates that even if he or she willingly engages in sexual intercourse, the sex is not consensual.

Another rationale comes from the fact that minors are generally economically, socially, and legally unequal to adults. By making it illegal for an adult to have sex with a minor, statutory rape laws aim to give the minor some protection against adults in a position of power