HOWEVER....my sex drive is through the roof, and if I don't initiate and push for it, then we only have sex as often as HE wants it, which is 1x per week, sometimes more but many times LESS...
Having always been an HD man myself, I never understood (or believed until recent years) how a man could want sex less than once a week, if he liked sex at all. It doesn't compute in my way of thinking. It's hard for me to understand why a man would want sex after 8 days, but not after 4 days. Even after just 4 days, the male body is more than fully recharged. How does an additional 4 days build further desire?? I'm tempted to say that I don't believe for a second that your husband is not self-pleasuring if he's "going" a week without sex with you. I would probably have self-pleasured about 10 times in that interval, and that's just an average.
But then again, I've never gone more than a week without sexual release in my whole adult life, so I can't actually speak for the experience.
On a physical level, sex has always seemed like a daily function or need, not unlike sleeping or eating. Going a week without physical sexual release is like quitting sex and resuming again. It completely breaks the continuity.
You all should quote to your husbands the studies which show a reduced risk of prostate cancer for men who have 20 or more ejaculations per month. Once-a-week just doesn't cut it.