When I was really young I use to watch the adds in the news paper.
If you like the series in general though, you still might somewhat enjoy this.
Moreover, these films are all presented as a series of brief vignettes where the sexiness tends to be in the situation leading up to the sex rather than in interminable softcore scromping.
In the first vignette three girls seduce their dorky teacher while on a school trip.
Six more first-hand accounts of sexual awakening amongst school girls in the early Seventies - some with a happy end, some without.