Ann is right. In the same vein, young men knew if a girl was 'up for it' or definitely wasn't. (I say girl meaning young woman, not underage girl.) Most men (or boys) would try their luck with the young woman (or girl) they'd taken out for the evening, wined and dined (half shandies and a bag of chips).
In the 60s, God help the apprentice boy working in a factory full of women - and any newbie had to go through the rites of passage in the workplace, and very humiliating it could be, young man or young woman.
Would the film Rita, Sue and Bob, Too be acceptable today even though it was filmed as recently as the 80s? That was about two schoolgirls having a fling with a middle aged, married man.
In the 50s and 60s it was considered normal for a married man to spend Sunday lunchtime in a pub watching strippers whilst his wife was at home cooking his dinner.
I really cannot convey strongly enough how much times have changed over the last 50 years.