Dating or marrying an older man can have many merits, but there are still several potential disadvantages. For instance, an older man is less likely to tolerate changes to his life. Instead, the older man probably has an established and well-organized routine that has worked for him for years, and he doesn’t want to alter it. Because older men can be set in their ways, you should think twice before dating one unless you are willing to do most of the adapting.