Ha. I have so much bloody hair they could pull handfuls out and nobody would notice, although I would
.
As for the spanking, if you're going to do it I'd advise going slow until you learn both how hard you can tolerate and how hard or prolonged will leave marks. My pain threshold is higher than my bruise threshold and I had to spend four days of a tour explaining why I was black and blue once after a hefty spanking on the first day, although it was fun at the time.
If it's over the knee it can be awkward positioning yourself too, especially if you have big boobs. I'd recommend him sitting on the edge of the bed rather than on a chair so you can lean on your arms a bit, although an armchair is OK
.