when can a (teenage) boy have a girlfriend? and why?

It really depends on the kid, the level of responsibility and maturity. But they grow up so fast, that anything a parent can do to discourage them seems like a good idea. But in general, I'd say 15, no earlier.

But then again, what exactly is meant by "girlfriend"? Someone the boy likes that likes them back? That happens sometimes at the age of 4!!

When both the teenagers parents agree that the teenagers are mature enough to date. People mature at different rates and it may be hard for a guy to accept, but girls mature emotionally faster than boys.

Until you are allowed a girlfriend, just enjoy girls company in a group. Your parents may relax a bit if you spend time together with them so they can see how you interact.

Why Some Teens Wait

Some teens are waiting longer to have sex — they are thinking more carefully about what it means to lose their virginity and begin a sexual relationship.

For these teens, there are many reasons for abstinence (not having sex). Some don't want to worry about unplanned pregnancy and all its consequences. Others see abstinence as a way to protect themselves completely from STDs. Some STDs (like AIDS) can literally make sex a life-or-death situation, and many teens take this very seriously.

Some teens don't have sex because their religion prohibits it or because they simply have a very strong belief system of their own. Other teens may recognize that they aren't ready emotionally and they want to wait until they're absolutely sure they can handle it.

When it comes to sex, there are two very important things to remember: one, that you are ultimately the person in charge of your own happiness and your own body; and two, you have a lot of time to wait until you're totally sure about it. If you decide to put off sex, it's OK — no matter what anyone says. Being a virgin is one of the things that proves you are in charge, and it shows that you are powerful enough to make your own decisions about your mind and body.

If you find yourself feeling confused about decisions related to sex, you may be able to talk to an adult (like a parent, doctor, older sibling, aunt, or uncle) for advice. Keep in mind, though, that everyone's opinion about sex is different. Even though another person may be able to share useful advice, in the end, the decision is up to you.

I say 16 because at 15 they are still running around all crazy and not thinking right.

I think you are asking the wrong people here kid, you should face this question with your parent(s).

When his Parents say so.!

kid I had a boyfriend in kindergarden

i say whenever you want and are ready