Keep him waiting for explosive sex!
Sexual anticipation is one of the greatest methods of foreplay in the book...
You know how it feels when you just start dating a guy: you really want to have sex with him on the first date, but you string it out over three, four, maybe five dates of ferocious kissing and heavy petting, until finally he's deep inside you.
Well, just because you've been with your current lover a lot longer than five dates, there's no reason why you can't build some healthy, sexual anticipation. Put a bar on penetrative sex and oral sex for a certain number of days, and during that time have a series of mini-dates with your lover – go to the cinema, go for dinner, go for a sunday afternoon walk and picnic together.
You can't have sex after any of these dates, but you can kiss and indulge in some heavy petting. By the end of your mutual bar on sex, you'll both be bursting to get your kit off properly!