Young Thug having a song titled "IDK Why" is just perfect. Sometimes his style is representative of the title, loose, unstructured aside from yelps and his puppy like ad-libs. Think of "IDK Why" as another freebie, one where he talks about taking her V, being an entrepreneur and enjoying his lifestyle. Count the number of times his voice registers a new high point, somehow like most Thugga Thugga songs, this is going to get stuck in your head. And I don't know why.