I do not believe that there was in that genteel Bohemia an intensive culture of chastity, but I do not remember so crude a promiscuity as seems to be practised in the present day. We did not think it hypocritical to draw over our vagaries the curtain of a decent silence. The spade was not invariably called a bloody shovel. Woman had not yet altogether come into her own.

麻烦老师分析一下这个比较句 so crude a promiscuity as seems to be practised in the present day， 含义以及如何分析和理解？