In my younger days they didn’t. It’s a recent and regrettable development (I speak from a UK perspective).
I blame two factors. One is the increasing intrusion of American usages into British English. Many US English speakers have what is by European standards a peculiarly prudish and prissy tendency to avoid direct reference to bodies and bodily functions, and increasing numbers of people in the UK, whether through mistaken pretentiousness or simply oblivious parrotting of what they hear on TV shows and other media, have been adopting American linguistic habits and idioms.
The second factor, for which I can offer little explanation or justification, is what seems to me to be a general and widespread juvenilisation of popular culture. I might tentatively suggest that it has some connection with the political drift toward populism and vilification of cultural ‘elites’ – but in my perception it is alarmingly evident that traditional British anti-intellectualism, both in mass media and in people’s conversations on the street and in the pub, is warping into something more akin to pro-crassness and feeble infantility.
What with the proliferation of crude, childish hieroglyphics in written communication (yes, that is what emojis are), thus severely curtailing the exchange of any kind of subtle, complex or sophisticated ideas or concepts, we are daily becoming more and more like Orwell’s Proles: ill-informed, limited to banal expression of stereotyped feelings, and pathetically easily manipulable by those holding power.