Is it normal to like to be slapped during sex?

hi i'm a 24 year old gir really polite successful and a little shy and i guess i'm normal in other sides of my life but when it comes to sex i cant be so sure....
i like to be spanked and i like my partner to slap my face and my breast...
i enjoy the pain and the feeling that it gives to me.... i really dont know why,why do i like it and
is it normal???