Don't worry about it, they grow out of it or if not just support, that's all that matters!!My son at 13 had bad runny diarea in his school clothes whilst sat in his chair in class. He was called so bad for messing himself at that age and in public. He begged me to let him go to school in trainer pants under his school trousers just in case it happened again, I agreed and got small huggies, it did the job..After 3 weeks I just let him wear plastic pants over his normal underwear just to make him secure. he did have a pee accident whilst wearing them but no one noticed, so they are now a regular thing under his school trousers, it makes him happy so all good.