Basically, immaturity; they don't fully understand the reasons and effects of relationships, so their judgment is often quite off. They are also undergoing a point in life where their body tells them to get close to someone else - puberty, and animal instinct - so they simply follow its instructions.
Some people form romantic relationships at a young age in an attempt to appear more grown up or because they think they are in love. Most people, though, hold off on forming serious relationships until college or even later.
young people could interact without supervision
well at a young age you are not at the best mind set to be in a real serious relationship.
Young people could interact without parental supervision.
friends and family because they are always there for you when you need help and feel sad.
St. Valentine Patron Saint of Love, Young People, Happy Marriages
Most likely not depending how young
yes they were in the 1900's people use to marry when they where Young and there was different relationship i think
young people would generally avoid long term relationships. However when people get older they get a stronger feeling of having a companion. As a result not many people are looking for long term relation ships.
Yuppie (short for "young urban professional" or "young upwardly-mobile professional") is a 1980s and early 1990s term for financially secure, upper-middle class young people in their 20s and early 30s.
Early marriage might be a problem for some in the way their relationships go. Being too young or not knowing one another well enough can cause a lot of hardship in a marriage.
cuz they can. cuz they can.