A strong case can be made for slow romantic sex where partners take it slow, looking into each other's eyes, taking time to feel the connection between them. But it's my belief that at some level of their psyche or another, all men have a predisposition to what I can only describe as animalistic sex.
I'm talking about sex where the guy just bangs his woman as if the survival of his genes depended on it (scientifically speaking, it does). He's not thinking of romance or a connection here, instinct is telling him to plant his seed deep inside the fertile pasture known as her womb, so he is pistoning that dick as deep and as hard as he can.