Katherine, 38

I'd got into a total rut with my husband: after 10 years of bliss, we had kids, a house, we were the perfect couple, and our sex life was totally boring.

One day I decided I'd had enough of the same position and the same way of having sex every time and suggested we try out the old postman fantasy! He rang the doorbell, made me sign for a package and then started making advances towards me... 
It sounds corny but we had such a laugh and we carried on playing out our fantasies. Sometimes I play the randy housewife trying to seduce the shy postman, and sometimes we do the businessman/client one... 

It sounds daft, but fantasising has brought us so much closer together - we can be like teenagers again, just having fun. It's more than just a sex game...though I have to admit sex has never been quite the same and I get much more pleasure from it!