It's a sign that we know our dear one would have us laugh again. It's okay to laugh. Grief is as old as mankind but is one of the most neglected of human problems. As we become aware of this neglect, we come to realize the enormous cost that it has been to the individual, to the families and to society, in terms of pain and suffering because we have neglected the healing of grief. Essential to a grieving person is to have at least one person who will allow them, give them permission to grieve.
Some people can turn to a friend or to a family member.
Some find a support group that will allow one to be the way one needs to be at the present as they work through their grief. Dealing appropriately with grief is important in helping to preserve healthy individuals and nurturing families, to avoid destroying bodies and their psyche, their marriages and their relationships. You can postpone grief but you cannot avoid it. As other stresses come along, one becomes less able to cope if one has other unresolved grief. It requires a great deal of energy to avoid grief and robs one of energy for creative expression in relating to other people and in living a fulfilling life.