Is it normal that i dont get pleasured by sex?

Before sex, i enjoy the kissing and foreplay. And the thought of sex turns me on soo much, but when it actually comes round to it, it just feels like something going in and out of me..the only reason i keep doing it is because i get really turned on over the thought of the guy been inside me...iv had really good sex. is it just me nd how can i improve it? :s