to be fair to the OP couples do get a certain feeling for how long they are together/apart. it's not about insecurity, in fact it can be the opposite. "OMG Ilikebeer has been gone too long for a simple trip to airport. something bad has happened to him and I want to help him."
Over the years we do develop our cover stories. I know that for me I might avoid a punt if the SO is likely to call. I really want to ensure I have an uninterrupted punt which for me also includes afterwards, being able to get home without too many questions.