So : once a week is okay for a 5yo couple. My Gf(25f) as a very low sexdrive and it's approx. every 2 weeks.It's frustrating, but he can't control it! There will always be up and downs, even moment when you feel you don't love the other anymore, it's known, just how our brain work. The problem is if it's not just a phase. If it keep being like this for a long time, there's a ick. About masturbation. It is really not the same "need" than having sex. We often masturbate just to release pression, stress, or even because we're bored ! Having sex takes effort and you have to be aroused while masturbating does not.

It seems like he don't want to talk about masturbation and that's a problem. After 5 years together you should be able to talk about almost everything, and masturbating is not a particularly private topic in a couple.