Here's why:
* Fused sentences occur when two or more independent clauses (complete sentences) are joined together without proper punctuation or conjunctions.
* In this example:
* "Deciding on an outfit is frustrating" is a complete sentence.
* "You want to look unique" is also a complete sentence.
* They are joined together only with a question mark, which is not a proper conjunction or punctuation mark for joining two independent clauses.
To fix it, you could use a few different methods:
1. Use a comma and a coordinating conjunction:
"Deciding on an outfit is frustrating, and you want to look unique."
2. Use a semicolon:
"Deciding on an outfit is frustrating; you want to look unique."
3. Make it two separate sentences:
"Deciding on an outfit is frustrating. You want to look unique."