Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much. The condition od your boy friend is called Coprophilia also called scatophilia or scat is the paraphilia involving sexual arousal and pleasure from feces. Such a mental disorder needs psychiatric intervention. please arrange a consultation. If you require more of my help in this aspect, Please post a direct question to me in this website. Make sure that you include every minute details possible. I shall prescribe some psychotherapy techniques which should help you cure your condition further. Hope this answers your query. Available for further clarifications. Good luck.