My sons are grown now; no problems with them, either!
ETA: One reason it may seem as if intact boys have a lot of problems is that this is one of the few places on the internet where parents of intact sons can come asking for help/advice without hearing "Well, you should have gotten them circ'ed!" There is such a dearth of accurate information out there!
The vast majority of intact boys never have problems with their penises; of those that do, the problem is often caused by improper care, or by wrong advice from doctors and nurses. Most intact men NEVER have a problem! This cannot be stressed enough.