By temperament, which is the real law of God, many men are goats and can't help committing adultery when they get a chance; whereas there are numbers of men who, by temperament, can keep their purity and let an opportunity go by if the woman lacks in attractiveness.
-Mark Twain
Kill no vermin as fleas, lice, ticks, etc in the sight of others; if you see any filth or thick spittle, put your foot dexteriously upon it; if it be upon the clothes of your companions, put it off privately; and if it be upon your own clothes, return thanks to him who puts it off.
When I was a youth I used to take all kinds of pledges, and do my best to keep them, but I never could, because I didn't strike at the root of the habit--the desire; I generally broke down within the month. Once I tried limiting a habit. That worked tolerably well for a while. I pledged myself to smoke but one cigar a day. I kept the cigar waiting until bedtime, then I had a luxurious time with it. But desire persecuted me every day and all day long; so, within the week I found myself hunting for larger cigars than I had been used to smoke; then larger ones still, and still larger ones. Within the fortnight I was getting cigars made for me--on a yet larger pattern. They still grew and grew in size. Within the month my cigar had grown to such proportions that I could have used it as a crutch. It now seemed to me that a one-cigar limit was no real protection to a person, so I knocked my pledge on the head and resumed my liberty.