BDSM Dating in Hertford

BDSM dating on Fetish.com

Hello, I'm new to the scene and never experienced any sort of bdsm driven relationship before but my current girlfriend insists she's a brat, is constantly disrespectful and sometimes just mean to me and claims it's cause she's a brat, she wants me to punish her but I don't really know how to go about doing it (mainly cause if I start spanking her she starts begging me to stop).. So I'm confused can anyone help???
Thanks!