You definitely need a good mental connection with the person to make the physical connection (sex) to be a really enjoyable experience.
A woman who takes a man, just for the size of his penis... well, its more like masturbation with dildo (and most men who pride themselves on getting laid just for the sake of the size of their penis - are indeed 'dildos').
There is also 'Romance' - the being together and enjoying life's experiences together. A shared experience, a bonding of trust and loyalty.
Brain scans of people who have fleeting flings and promiscuous habits have smaller brains than those who have strong long term relationships. It seems there is a part of the brain that keeps growing, while the 'Flingers' never give that part of their brain a chance to grow.
So, if you want 'good sex' - then 'love' is the best way to go about it.
Sex like an animal or sex like a human.
Hey Man, check out this OLD thread.