It's just a carnal inclination.

Morality, thou deadly bane,
Thy tens o' thousands thou hast slain!
Vain is his hope, whase stay an' trust is
In moral mercy, truth, and justice!

No--stretch a point to catch a plack:
Abuse a brother to his back;
Steal through the winnock frae a whore,
But point the rake that taks the door;
Be to the poor like ony whunstane,
And haud their noses to the grunstane;
Ply ev'ry art o' legal thieving;
No matter--stick to sound believing.

Learn three-mile pray'rs, an' half-mile graces,
Wi' weel-spread looves, an' lang, wry faces;
Grunt up a solemn, lengthen'd groan,
And damn a' parties but your own;
I'll warrant they ye're nae deceiver,
A steady, sturdy, staunch believer.

O ye wha leave the springs o' Calvin,
For gumlie dubs of your ain delvin!
Ye sons of Heresy and Error,
Ye'll some day squeel in quaking terror,
When Vengeance draws the sword in wrath.
And in the fire throws the sheath;
When Ruin, with his sweeping besom,