Nylon ukulele strings are rather durable and are less susceptible to damage from oils and sweat than metal wound strings which are often found on guitars. How often you need to change your strings depends on how much you play it. This could be every other month to about every six months. Restring your strings, if they need it, well before performances as the string will stretch considerably when your uke is first strung.
A piece of toast with peanut butter. Peanut butter should not cause diarrhea. In fact, the Cleveland Clinic recommends adding peanut butter to your diet if you develop diarrhea. If you are allergic to peanuts, however, diarrhea may occur after you eat peanut butter.
Too much peanut butter can cause diarrhea in a dog. It can also cause your dog to become overweight. This is why even though dogs can eat peanut butter, I would keep the dog away from too much peanut butter unless you want to deal with stomach issues or pet obesity. Moderation is key when it comes to safely feeding a dog peanut butter. Too much peanut butter causes obesity in dogs.