How Best to Interact with Someone with TBI

As a new caregiver I have searched and searched for advice on how to introduce my husband to new people. How do I explain the weirdness of our relationship? Just looking at the man you would never know he was injured. Mostly he does alright but interspersed through every day are the issues. The emotional roller coaster, lack of appropriate responses, juvenile behavior, inability to manage money, preoccupied with play, poor time management, difficulty completing daily tasks, initiating arguments, irresponsibility, one sided conversations. All of these can result in a disastrous first meeting if the new person isn't pre warned. Living in a new community away from my support group is so difficult. His youthful good looks when I married him have become a curse as caregiving has aged me and he is mistaken for my teenage brother. Or for those who do learn immediately that we are man and wife and he is a 35 year old with a degree in mathematics, how do I explain that no he isn't trying to be rude or irresponsible, his social governor is just off. There are safety issues too. For example children love his playfulness but due to his unpredictability any interaction needs to be supervised. I feel that a balance needs to be made. Meeting new people at my office, in church, in the grocery store what do I say? I want to show him proper respect but at the same time he almost needs to come with a warning advisory. His personality change has made him more of a people person. Somehow we have to get out there and become a part of the community.