Do something different

If you always employ the same old routine during sex, do something different. For example, try a different sex position. If you usually have sex with him on top, roll over so you're doing it on your sides, facing each other. If you haven't tried woman on top, get up there and ride him. If he likes rear entry (and which man doesn't?) then let him enter you from behind while you lie in the spoons position on the bed - that's more intimate than rear entry but probably just as exciting for him. Or take the initiative, and seduce him in the kitchen, making love on the table or the floor! These positions are especially fun to try when you're feeling horny.