I dated a 18 at 15 until I saw him cheating. It was before I knew men were players. Now, I look at my granddaughter and say noway. never. will I allow. 1/2 years ok, but anything over is too much. Men never seem to grow up, and it takes a woman till 30's to come to their senses. Bad cards dealt and trying to make the best of things. Do I think 18 was too old back then, no, when you were planning to marry that person, as the families before you did. When you married you stayed married thru thick and thin. At least, that was what I saw, and hoped for.