Often when I speak or write about the sin of lust, someone protests, arguing that lust within marriage is a good thing. I don’t believe it is. At all. Here’s why: Husbands and wives are called to love each other. Lust, as I would define it, is using another person for one’s own selfish gratification. And that ain’t love. Although sexual desire is not the only realm where lust creeps in, it seems...