Writer and actress Sharon Horgan gatecrashes six very different marriages and a wedding in a bid to open up the private world of husbands and wives. Sharon says 'everyone knows what they want from a wedding - drunk by noon, quick go on a bridesmaid, chocolate fountain - but what do we want from a marriage?' She admits marriage is a serious, lifelong commitment but nobody tells you how to do it. She meets six different couples to explore the essence of a lifelong and happy marriage. She wants to find out how they've made it work and what she can learn about marriage from their relationships. First up, she spends time with tantric sex teachers Kavida and Roland who think there's no reason why marriage should get in the way of a 'mind-blowing sex life.'