<human>: Can you provide a brief rundown of the text in within 3 sentences?

I live with my boyfriend and we have been together for two years. When he is in lounge mode, he has a habit of tugging at his balls and dick (non-sexual). I find it highly irritating for a grown man to be addicted to whipping out his dick randomly for play.

I would compare this behavior to nail biting or hair twirling but on a way grosser and inappropriate level. He gets offended when I tell him to stop and says "I can do whatever i want with my body". 

Help me! What should I do? It bothers me so much. I feel like he is so used to it that he could do it subconsciously in front of friends/family.
<bot>: BF addicted to tugging at his privates non-sexually when lounging around AT HOME and it irritates me.