Hi! I’m a physician. I'm new around here, though a long-time DL. I've just been lurking up to now, learning from the community, but this is a topic to which I can contribute!
UTIs include infections anywhere in the urinary tract, including the bladder, prostate, and kidneys. In men, prostatitis and kidney infections (pyelonephritis) typically cause more severe symptoms, like fever and weakness. Bladder infections cause burning, increased frequency and spasms, and sometimes blood, but not usually fever. Bloody semen would presumably be from a prostate infection, which usually hits hard and fast, with fever up to 103. Bladder infections clear up quickly with antibiotics, but kidney infections require 7-14 days to feel better. Prostate infections sometimes require treatment for up to a month. So there's a huge range!
But males are blessed with a long urethra, which pretty much insulates us from getting infections from wet or messy diapers, no matter how long they are worn. (Women's bodies are different, though, and they probably need to be very careful in this regard.) Not changing often enough is likely to be an issue for skin health in a man, but should not be blamed for UTIs. UTIs are fluky, or due to poor drainage (bad bladder mechanics/function or an oversized prostate due to aging--why older men have more trouble than younger men).
Standard disclaimer: Of course, this is general info, and should not be mistaken for medical advice...talk to your doctor if you are having symptoms that worry you.
. I’m getting tired! Thx all so much for feedback and support. Rough day today. I wear 24/7 and the dr was very professional and understood with my history of OAB/and IBS. My Dr provides a prescription for briefs and Toviaz! Ugh. Night, update later.