Because it will give you an opportunity to say when you're not interested in something,

因为这个句型可以让你表达你对某事不感兴趣，

Don't 课堂 - SpeakingMax英语口语达人

cause they all seem to have girlfriends or are not interested, but...

因为他们都好像有女朋友或者对这个不感兴趣，但是……

在哥伦布环岛 - SpeakingMax英语口语达人

I am not interested in that subject.

我对这个话题不感兴趣。

I'm ~ing 实战 - SpeakingMax英语口语达人