- e# ~, X% K# S! o) q! G5 D: t' _ ! j& R( M6 S1 Y % Z5 q# d7 v* q$ f9 zIt's official, marriage is bad for your sex life, a study has revealed. : I' D+ _# C* w! BCouples who have sex over four times a week before their wedding, barely have it once a week three years after tying the knot, a survey in Britain has found.