Re: Sleep apnea and sex drive
I had problems with feeling "woozy" 3 years ago (I was 47, in good health, sex was fine.) My GP did an at-home sleepy study and found that I stopped breathing 20 times every night (I don't even SNORE, per my wf.) After a week on a CPAP machine, the wooziness went away and my energy bounced back. It took a couple of tries with masks (because of my sleep style - flip-flopping.) I settled on nasal pillows. As a nice side effect, I don't get colds or allergies anymore, and I have more energy for my sex life.
Make your dude find a mask that works and it will be WIN/WIN for him (and you!)