Uncovering Nakedness In Leviticus

Cos wicked men are easily led
From here to there, from bed to bed,
By orders from their smaller head
We've had to ban the quadruped.

Uncovering the nakedness
Of relatives, we will not bless;
The major reason, I confess--
It makes reunions such a mess.

Thou shall not mark upon thy skin;
It is, of course, a wicked sin
As bad as if a man begin
To bed a sheep, or sleep with kin.

We read the bible, and we choose
Which laws to keep, and which refuse;
Not Godly Law, but human ruse...
As old as time, so hardly news.

Context here, and especially here.