Sex would get bouring if it was the same routine every time , no mater how much you are into the person . How do you keep the sex exciting and not clinical when in a long term relationship?
Play in New places, buy new toys (we have lots of toys including a frame in our room that can be used for a swing and other things) and always remember everyday all day is foreplay, a kind word, a soft touch thoughtful gestures, it all adds up.