Of course one swallow doesn’t make a summer, but one counterfactual example : Four students visit a pub to meet their respective boy/girl friends at lunch time :
Punishments Boys school : 2 Boys Severe reprimand.
Girls school : 1 girl 2 strokes of the cane on the hand
1 girl 500 lines ( she broke down when sentenced to the cane ).
I can vouch for this one : one of the boys was me ! ~The two schools were separated by about 4 miles so the boys had used a car to get there and back , the girls just sauntered across the road.