After Scorpius threw up the silencing charms after he had closed the drapes he explained that because so many Pureblood marriages were arranged, a blind eye was turned to all but the most elite witches shagging around. If they were going to be shackled to someone by contract, then at least give the ladies a bit of freedom to find out what they liked and didn’t. Sometimes it didn’t work out that way, especially if both sets of parents were hell-bent on the virginity clause. But that was almost extinct now.