Sure saved time not having to unfasten them!
Reminds me of an incident during my freshman year in college, either in '69 or '70. Girls generally sat in the front of the classroom, and besides no bras, halter-tops were the preferred top. Our English instructor was a young male teaching assistant, who was either perverted or extremely horny. He wandered around the classroom with his prolonged fixed gazes on the females to the point of making some of them uncomfortable. So an evil group of females got together one day near the end of the semester and they all wore short skirts and
no underwear. All of a sudden in the middle of class, while he was sitting at his desk, on cue, they all parted legs giving him a brief but unexpected view. He had to remain seated behind the desk for the remainder of the class.