Well this is certainly interesting.
Looking at IMDB right now, the movie gets an average of 7.7 from female reviewers and a 3.8 from males.
There also seem an absurdly high number of 1/10 ratings. 47%. That's pretty hard to believe.
Looking further, 60% of female reviewers give it a 10 and 53% of male reviewers give it a 1.
All in all it seems if you want ac actual non-biased sampling you just ignore the extremes and give it a mark out of 8