Another slap hit his face ( this time the opposite cheek to avoid bruising ) and he let out a choked sob . " I said do n't fucking talk to me like that . " Riku growled threateningly , shoving his fingers in and out of him faster . He took care in not hitting his prostate because he knew deep down Yura was enjoying every fucking minute of it .
According to the above context, choose the best option to answer the following question.
Question: Where are the fingers sliding in and out of ?
Options:
- A man 's butt
 - None of the above choices .
 - a woman 's vagina
 - a man 's mouth


A man 's butt