In the recent few months my father, he's 62, has been exhibiting odd behavior where he goes outside to go potty... We have 3 available bathrooms, easily accessible in the house. He continues to do this and says its because he "had to 1 or 2" or "my stomach hurt"...but our bathroom is literally the same distance as the outside. One morning he even walked out of the house to go potty outside despite every bathroom being free and closer to him. I dont know what to do anymore...we've repeatedly asked him and we still have no idea, it's really frustrating. Is this maybe a sign of something serious?