What most biographies forget to mention is that Franklin was also member of the Hellfire club, which is described as [1],

> Members would drink vast quantities of alcohol and gorge themselves on food. Drunkenness was a prerequisite of The Hellfire Club. They’d dabble in most of the seven deadly sins to be honest – with gluttony, greed and lust being regular activities. Add in a smattering of gambling, fornicating and blasphemy, and you get the idea of a night at the Hellfire Club.

And,

> When we say ‘poking fun’, they were all about dressing as monks, performing parodies of religious ceremonies and making mock sacrifices to Bacchus and Venus. Along with that there was huge amounts of boozing, feasting, entertaining prostitutes and sharing pornographic materials.

[1]: https://www.walks.com/blog/hellfire-club-london/