If a guy hasn't had a girlfriend by his early 20's does that show signs of immaturity?

Many people say when you go through such experiences you learn from them and learn to grow up and deal with situations differently. So by this I'm guessing when guys go through relationships they mature with every relationship they have been through.

So what about if he has not had a relationship yet and he is his early 20's? If he still has not had a girlfriend yet does that show signs that he lacks immaturity because he may not be able to handle certain situations in a relationship and may not know what to do?

When I say early 20's I mean around 20-23.
If a guy hasn't had a girlfriend by his early 20's does that show signs of immaturity?
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