Interesting point, Denzark. The sadist I refer to approached me as a Dom. I wanted pain, he liked giving pain. It provided the 'in' he needed to get into my head. He wasn't exactly forthcoming on his enjoyment actually only starting when I was quite literally quacking with fear, Ya know what I mean?I'd have thought being a masochist makes you less of a target for the sadist. For the bdsm sadist you are a target because there can be consent and there is a common interest (kink). For the true sadist if you enjoy it there is less suffering and less pleasure for the sadist. It logic Captain Kirk.
And we spoke for 6 months before he showed his real colours. If, in that time of tease and light play and negotiations, he never gave me any pleasure, I'd have been long gone. So, giving pleasure isn't outside of the realm of the evil sadist. It also doesn't make them a "not real" if he was aroused by my pleasure. That is a very one-dimensional view of a very complex personality type, imo.
I remember my King would often tease me when I ask for pain, by not giving it to me. He loved the control of giving and not giving. He saw himself a sadist... (sexual..not evil- I hasten to add) He found the most pleasure when I was crying in physical pain that He gave me. He relished the hiss of my breath as I felt His pain or the deep breaths as I try to breathe through pain that made my body recoil. He growled in pleasure. And I felt pleasure in His growls and deep satisfaction.
Before a scene, He often asked me how I was feeling and more often that not, I would tell Him I am scared and wish we could skip the pain. He would have me kneel, and ask me to accept or reject His pain... always... always this ritual. And although I dreaded the pain itself, I would agree eagerly because I knew the deep pleasure I gave Him. In the end, the only person He trusted Himself to give pain to.
He gave me pain for His pleasure. My pleasure was the sensations...but only after the endorphines had started flooding my system. Before that, my pleasure came from His growls and hisses.
This is the play between a sadist and masochist.
If He gave me pain for my pleasure only... I would not have wanted it. That defeats the whole purpose, in my experience. YMMV.