is hitting your girlfriend w a belt to extreme?

ohkay so me and my boyfriend were trying some kinky things out last night. and he took his belt off and hit me very hard on my bottom w his belt 10 times. and this is the aftermath from it. idek how i feel about it but i can say that it is very painful. i just wanna know if anyone else sees this as too extreme or if it's ohkay. 

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