There’s a linguistic satisfaction to saying fuck. The word has nice consonants. The feeling of curling your lower lip around your lower teeth to make the 'f' sound is a reliably good one. There’s a deeper visceral satisfaction, too. Because the word was so long verboten, because it’s still technically R-rated language even though no one really thinks about such ratings anymore, it still feels a little dangerous. It feels adult, at least insofar as children under 12 are the only people from whom it would be shocking to hear the word.