I'm not personally squeamish about real blood or injuries, and I have been around dead people before. I'm the guy they always get to do the fiddly first aid stuff at home, for example, when someone has cut their arm off slicing turnips and needs a tourniquet and a couple of aspirin. That said, I don't generally find it erotically appealing either. A car crash site is not going to turn me on. A crucified woman probably will (depending on the scenario), but I think that's because it's safely (for me) in the realm of fantasy. The flogging/whipping and some torture is also in that realm. Once we get into hot needles, breast/genital mutilations, or even tying breasts to the point where blood circulation seems impaired, it stops being exciting to me.
I agree that Markus is one of the best there is with hand drawn pictures - a real sketch artist! The quality of his work does overcome my lack of enthusiasm for some of the things he depicts.