Recently, my girlfriend has been begging me to inflict pain on her. I refuse, not because I'm timid, but I have no idea how to do so safely and with little or no injury, since we are both new to this. The only things we've been doing is dripping candle wax and using the paint brush whip. But she wants more. It seems she has a very strong masochistic streak, and this isn't enough. Any ideas?