Interesting demographics information

I saw this movie a while ago and absolutely loved it, so I decided to show it to my girlfriend. She is in her 30s while I am in my 20s. It turns out she did not like the movie much, so I decided to take a look at the demographics here. Guess what, Her gender + age group voted this movie 3.6 out of 10 (7 votes), which is much less than what the other demographic groups voted. I also noticed that males liked this movie more than females by quite a bit. Why is that? Why do females, in particular those in their 30s, dislike a movie such as Yomigaeri?