Daddys and daughters public restrooms

Brandy • Married 1-11-14 and we have a wonderful 3yr old due with #2 in January 2016
Ok so i want to know what you would like your men to do or what they do do if they are in public and THEY need the restroom but are with their 5 year old or younger daughter not if the child needs the redtroom but say if daddy has a sudden bout of massive diarrhea what then?