[RSMo. §566.130]
A person commits the offense of indecent exposure if he knowingly exposes his genitals under circumstances in which he knows that his conduct is likely to cause affront or alarm.
[CC 1976 §22-62]
Any person within the City who shall be found loitering on or about the abode or residence of another, engaged in lewdly peeping into a window thereof, viewing and observing, or attempting to view and observe, the private actions of the occupants thereof, or who shall be found engaging in any act or performance generally called that of a "peeping tom," shall be deemed guilty of an offense.