Hello
Thanks for your query.Based on the facts that you have posted it appears that your boy friend has developed brown spots on the shaft of the penis very recently.
Most liklely these are Fordeyce spots or sebaceous cysts which occur due to accumulation of sebum beneath the skin.
Normally they subside of their own without any treatment .Please consult qualified
general surgeon for clinical examination and to confirm the diagnosis.
Dr.Patil.