The History of Sex: Geneva -- John Calvin's Old-Fashioned Remedy For Lust -- (Chap. V, Pt. 4)

Born the year before Luther's pilgrimage to Rome, Calvin is usually depicted as thin and sickly, with a long, drawn face, a needle nose and a pointy beard, as if he's half dead already but sticking it out just to make life miserable for the rest of us.

Notably, the first book in his extremely prolific career was a commentary on that old Stoic, Seneca (the one who warned against rushing 'headlong into copulation').

Having been run out of Paris because of his Protestant ties, Calvin found himself kicking around the Continent in 1536 when he made a fateful detour to Geneva, then an independent city-state divided by political and religious squabbling.

The city council had officially plumped for Protestantism, but it initially resisted Calvin's radicalism and soon expelled him. 

Calvin then migrated to Strasbourg, where he surprised some of his friends by falling in love—or as close to it as he could.

Having been schooled in Renaissance humanism, Calvin preached that beauty was a gift from God; consequently, it wasn't inherently 'wrong for men to regard beauty in their choice of wives;' equally, it wasn't 'wrong for women to look at men.'

But he also added a common-sense caveat: 'Those who excel in beauty are exposed to many dangers, for it is very difficult for others to restrain themselves from lustful desires.'

Calvin promoted marriage among his followers as a 'remedy' for lust—'Satan dazzles us… to imagine that we are polluted by intercourse'—while also telling husbands and wives that they should not 'withhold sex from each other.'

Personally, though, Calvin seems to have been inclined toward celibacy, having married mainly to practice what he preached.

'The only beauty that seduces me is of one who is chaste, not too fastidious, modest, thrifty, patient, and hopefully she will be attentive to my health,' Jean wrote to a friend.

After a few false starts (including a young woman with a large dowry—Calvin thought it would be 'crazy' to marry her just because of her wealth; she didn't even speak French), he settled on a widow who had two children of her own.

Not only did Idelette tick all the Calvinist boxes (pious, frugal, etc.), Jean's friends were surprised to find that she was 'actually pretty.'

Idelette de Bure, Calvin's wife,
on a Belgian stamp

The plague cut short their honeymoon, and all their children were stillborn or died young, but they seem to have genuinely loved each other.

When Idelette passed away, Calvin never remarried.