John Calvin Commentary Deuteronomy 25:11

"When men strive together one with another, and the wife of the one draweth near to deliver her husband out of the hand of him that smiteth him, and putteth forth her hand, and taketh him by the secrets;" — Deuteronomy 25:11 (ASV)

This Law is seemingly harsh, but its severity underscores how very pleasing modesty is to God, while, on the other hand, He abominates indecency. For if, in the heat of a quarrel, when mental agitation might excuse excessive actions, it was a crime so severely punished for a woman to take hold of the private parts of a man who was not her husband, much less would God pardon her lasciviousness if a woman were driven by lust to do anything of that kind.

Nor can we doubt that the judges, in punishing obscenity, were bound to argue from the lesser to the greater. A threat is also added, lest the severity of the punishment should cause them to be too lenient or negligent in inflicting it.

It was indeed inexcusable effrontery to willfully assail that part of the body, from the sight and touch of which all chaste women naturally recoil.