Is virginity a character flaw?
Traditionally in Japan young girls were assumed to be maidens, to the point where the terms were at times used interchangeably. Perhaps in today’s sex-positive, metropolitan world, it’s assumed that youngsters of both genders will fool around.
In that light, B gata H kei appears to be something of a deconstruction of high schoolers’ attitudes towards sex. The details strain credulity (aiming for 100 casual sex partners in high school? Really?) but the overall idea that impressionable and insecure teens feel obligated to put on airs is dead on. It’s interesting that so much of the main character’s insecurities rest on the gross physical details of her anatomy, but what better symbol for the teenaged preoccupation with sex?