This is a great set of questions as I have Always looked at porn with girls who seem to be in pain and wondered if that stuff brought anyone who watched it some form of arousal. It may be a fetish, but it may also be a sign that they need to "talk" to someone... IMO
I am a dominant male and thoroughly enjoy light bondage, anal, doggy, facials, and deep hard, intense fucking, but never has it been about humiliating or hurting anyone. I am turned on when I sense or know that I'm the most intense, longest, best, deepest or thickest cock that has ever fucked them. The squeals, grunts, yelps, and gasps seem to make my cock as hard as steel; I assure you it has nothing to do with enjoying your pain or your difficulties adjusting to my cock - I want to give you the best fucking ever! When you have a body shaking orgasm or I feel that warm liquid release inside your pussy; something clicks, I think I grow an extra inch and I start to fuck like a machine - full strokes, pushing deep so you can have another - for me, its not just about my own pleasure, its more about bringing you pleasure. I have to believe its something primal...
(1) YES, It does increase my pleasure to know that you are being stretched. It's stimulating and exciting when I first open you up with my cock - again, its all about pleasure, not pain. That first gasp followed with "Oh, My God" is such a turn on... However, sex can easily get very frustrating and/or downright disappointing if I cant get in or you dont adjust... In addition, if youre not really enjoying it - its a real bummer. I want natural lubrication, deep grinding, and full length squatting with squeals of delight.
(2) Yes, I cant recall a time where I didnt want to give her my entire cock, as deep and as hard as I could pound her, but not because she was uncomfortable or couldn't handle my penis. Again, quite a turn off if she isn't enjoying it. I've had a few girls really TRY to get my cock in them, and I always obliged and cooperated, but it was never a turn on with a tiny vagina, regardless of how hot she was or how much we both wanted to simply fuck.
With that said, I had a roommate once who brandished an enormous penis; we tag teamed LOTS of girls during that period of our lives (he was a super slut) and I think it was more about of us competing with each other to see who could get more orgasms out of the girl or simply who could fuck harder than the other. Definitely primal - not evil. I'm fairly confident there were lots of girls who had no trouble remembering the how good they were fucked, days, weeks, months and maybe even years later; for some reason, its a good feeling to know you brought her more pleasure than others.
(3) Teach you a lesson and fuck the living shit out of you are two entirely different things. I want to fuck you so hard and make you orgasm so many times that when you stand up, your legs give out, and you fall to the floor. If there's a lesson there, its to have sex with me again, not mean spirited evil harsh reasons. Anyone coming from the position of harm or to hurt you is really fucked up.
Overall, its a turn on to see you squirm and squeal while your stretched open as it is to be balls deep and you have a crying trembling orgasm. Mission accomplished.
You said it.