Over the past year, things have changed about my libido. In the past, I felt sexually frustrated if I didn't have sex once a week (for me that is masturbation due to no partner). Now if I don't have sex, I just feel depressed and zombie-like. I try to ride an exercise bike daily for depression, but when I don't have sex I feel depressed in spite of exercising. If I have sex, then it's like my brain is normal again for a few days. I can get my work done. I enjoy the food I eat. Generally, I can function.

So now the sex is like medicine. I have no desire for sex. It's a lot harder to get aroused at first. It would be very easy for me to abstain from sex entirely now, except for that my brain seems to shut down without sex. It worries me that I might be so dependent on sex for normal brain function.

BTW I'm a 48 year old male, so the libido drop might be due to hormone and aging. I'm also chronically depressed, and it seems to be harder to manage. Also, I don't take any medications, so I can't blame it on that.