I like a wank as much as the next man but i don't think it can ever beat having proper sex. At best, wanking just involves a few of the senses - sight mainly and perhaps sound and touch to a lesser extent. By comparison, even a second rate fuck involves taste and smell as well plus the physical side of putting the woman into position and entering her. That moment of resistance as my cock pushes against her vagina and then over comes it can't be replicated even if you were to use a sex toy. And once the woman has surrendered to me (and I do believe that the act of penetration does require the woman to surrender even if she tries to be dominant) the initiative lies with me to use her as I want. It doesn't really matter to me if she consents to being fucked because I'm paying for her or otherwise, once she's consented to sex, I have control of her body and making her respond or even just fucking her as hard as I can if she's hell-bent on not responding is part of the experience and something that wanking alone will not give. Sorry if this sounds overly poetic, it's hard to describe the experience without resorting to flowery (if earthy) language.