Thanks for your query.Based on the facts that you have posted it appears that your spouse has multiple brownish bumps over his base of the penis and shaft of the penis.
The Penile skin is rich in sebaceous glands and hence prone to get more sebaceous cyst
due to accumulation of sebum beneath the skin.
Normally they fade away without treatment however they need to be treated if increase in size or get infected.
Please consult qualified General Surgeon
for clinical evaluation and further treatment.
If needed some of them which are bigger may need to get excised in Toto (Completely along with the sac).
Ensure to clean your genitals with warm water twice daily.