If you have seen the vet, and he tells you it is a hormone problem, and needs to be neutered, then I think that will be the best route for you to take at this time.
Evidently, the hormones in the dog are causing this trouble, and hopefully when you have him neutered, it will alleviate the problem.
Until you have him neutered, did you ask your vet for any ointment or cream that you might apply to these lesions or places that bleed, to take away any pain or itchiness in your dog?
The following information is from the following website that you may want to check out:
Skin Problems: Primary Keratinization Disorder or Primary Seborrhea
Primary seborrhea is commonly recognized in the cocker spaniel. Primary seborrhea is caused by overproduction of skin cells including sebaceous (oil) cells. The skin appears greasy and scaly with a foul smell. The trunk, back, and ears are most commonly affected. Itching varies among those affected. Diagnosis is done by biopsy. Treatment includes the administration of retinoids (vitamin A derivatives) such as isotretinoin. Concurrent treatment with antifungals may be indicated as primary seborrhea may be associated with yeast infection. Routine use of antiseborrheic shampoos and moisturizers is also recommended.
God bless and good luck!