[–] ProxyMusic 29 points Edited

Any male who urinates when orgasming/ejaculating needs to see a doctor ASAP. Because there is something wrong with his urinary tract that is causing his plumbing not to work properly. Prior to the start of the the process that ends in emission and ejaculation - when precum enters and goes through the male urethra to clear out any residual urine and create a semen-friendly environment, then seminal fluid follows - the neck of the male bladder is supposed to close shut automatically and completely. This is so there's no chance of semen backing up into the bladder or of a male peeing inside or on a partner.