Hubby is bleeding red blood in stools. Not all the time. But a lot lately plus zero sex drive could this be a combo? Hes 37

Unrelated. First get him checked by a doctor , cause of rectal bleeding could be simple hemorrhoids and make sure nothing serious . Second one at 37 is s serious issue that needs more attention, first ha has to see a urologist if every thing is o k ( not medical issue ) , then you both have to seek professional help good luck .
Yikes. At his age this should not be happening. Get your hubby to your family doctor as soon as possible and see what is going on.