Seriously, if you don't laugh at least twice whilst watching this clever teen sexploitation comedy, then you may be either dead, or have the same pitiable problem as the obviously biased reviewers who rated it poor.
Yes, this is a TEEN SEXPLOITATION COMEDY and as such it is not for those who imagine it to be anything else other than outrageous, or for those who need to remove the tight plug that apparently has hardened inside of their anal orifice, preventing them from understanding clever humour.
In its genre, this film pre-dates and fairly well defines the very beginning of the TSC film type, doing an admirable job in that category.
I challenge you not to laugh as you watch and if you don't, then you probably have a dire mental problem of some sort.