i believe sex is important. if a couple very seldom do it together, there is a chance either party is cheating. my bf asking for it even sometimes i didn feel like needing it, but i jz give it and get 'high' during the mid of the action . sex is like give and take for a relationship, sometimes u need it u will expect ur partner to give it to u and vice versa. of coz, it will be better if both need it the same time .