Most Helpful Guy
How about a nice 36 year old Gag guy who could teach her about life?
Lol, just kidding. She should find someone close to her own age, of course. I would say, at that age, when you're just leaving home, VERY close to your own age. By the time you are 25, a man even 35 would be fine, but at 19, he should in most cases be within a year or two of your age.1
Most Helpful Girl
At whatever age range she feels comfortable. She can technically use the 1/2 age + 7 rule. Or the age - 7 times 2. First one gives the youngest she can date and second give the oldest.1