If your child is in underwear all the time, plan ahead for outings. Before you leave home, try to get your child to sit on the potty or toilet. Just have your child sit and hope for the best. When you arrive at your destination, find the bathrooms. You'll want to give your child a preview, and you'll need to know what kind of arrangements to make.
Many parents carry tissue and wipes to use in bathrooms that are short on supplies.
You'll have extra room if you use the stall for people with disabilities, but the seat may be elevated and your child will need more help. An adult should always accompany a young child to the bathroom. Sometimes parents will need to be creative if the public toilet situation is awkward for a dad with a daughter. There isn't a perfect solution, although it helps to choose child-friendly destinations in the first place. Some dads will use the men's room, others will use the women's room, and some dads will ask a woman to take their daughter into the women's room.