My boyfriend is really playful and loves to spank, pinch, and wrestle with me. He is about a foot taller than me and It seems like he's always trying to dominate me. Today he spanked me over 20 times really hard! He's never rough like that during sex, just when we are hanging out. He was just being playful and I was laughing, but my butt was so red afterwards. IS this normal for him to be so dominating or do you think there's something wrong?