1. As human nature now is, it is very expedient that those who are so much together in youth, should, by such a restriction be taught to look upon all such intercourse as prohibited and incestuous; for unless such restrictions are made, it would be impossible to prevent the prevalence of very early corruption among young persons. (See Michaelis on the laws of Moses, Art.

108.)

2. That the duties owing by nature to relatives might not be confounded with those of a social or political kind; for could a man be a brother and a husband, or a son and a husband at the same time, and fulfil the duties of both? Impossible.

3. That by intermarrying with other families, relationship and its endearments might be diffused. These prohibitions are, therefore to be considered so eminently moral obligations as to be observed by all mankind

to uncover

Lévitique 18:7-19
Tu ne découvriras point la nudité de ton père, ni la nudité de ta mère. C'est ta mère: tu ne découvriras point sa nudité.…

Lévitique 20:11,12,17-21
Si un homme couche avec la femme de son père, et découvre ainsi la nudité de son père, cet homme et cette femme seront punis de mort: leur sang retombera sur eux.…