Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
• contains sexually explicit content or pornography ( provided , however , that non-sexual nudity is permitted ) ; 

```
. OPTIONS: ['Limitation of liability' 'Arbitration' 'Contract by using'
 'Content removal' 'Choice of law' 'Unilateral termination'
 'Unilateral change' 'None' 'Jurisdiction'].