"Another popular practice of the cunning folk was the casting of spells or charms to ensure a spouse’s fidelity, preventing them from committing adultery, for instance, a cunning man from Newcastle, Peter Banks, was charged in 1673–74 for offering to draw up a magical contract which would bind a husband to staying loyal to his wife for a year."
this is the saddest, most practical magic I have ever heard of
"You are the warlock Peter Banks? You can charge men and bind them with magicks and make them do your bidding?"
"Could you make my husband faithful to me? Just for, say, a year? Just a break for a year would be heaven."
"Madam, I could send your husband to the moon — could make him faithful as Damon to Pythias — could enchant his eyes such that he saw only you —"
"No, just a year will be fine, thanks."
"Just a year?"
"Just a year. How much do I owe you? I have brought all m—"