Ha ha. I've been thinking about this lately. I'm 23 and going to uni where a lot of the guys will be 18 / 19, so I've been wondering how low would I go. My conclusion is probably 19 to pull and 20 to date, but this would depend on maturity and how old they actually looked. So 19 year olds look about 15 whereas some look in their 20s. But, morally speaking, of course ther'es nothing wrong with it. As long as you have stuff in common and get on and fancy eachother - who elses business is it?