Could you date someone who was really immature?

I'm seeing this guy,he's nice and treats me well but can be very childish,he talks like a kid sometimes and everytime we kiss he will say in baby voice 'smoochy woochy',also if we are eating out somewhere or in pub he will fondle my and backside and it embares me,if im doing something even if its putting a dvd on he will jump all over me and it is really irritating,could you put up with someone like this?