A mans beard grows 5 inches a year so do the math. You would also have to take into account the hair growth cycle. Each hair lasts 1-6 years, which is why some people can grow their hair out very long and others can't get it as long.
You don't unless you take male hormones.
First, you have to figure out how long his beard actually is at a given time. In the link down the bottom, you can see that his head is roughly 1/3 of his total head + beard length. Given that the average head length is about 22.5cm, we could assume that his beard is about 45 - 50cm long from his chin to the tip of the beard. Now, to figure out how long it took to grow. By doing a quick couple of searches on google, you can see that the average hair growth for an adult male is about 0.5mm per day, which equates to about 18.25cm per year. By dividing his beard length in the photo (about 47cm) by 18.25, we get an answer of roughly 2 and a half years of beard growth. Keep in mind that these are rough estimates, and most of this information is likely to differ from person to person.
3.75 hours
It takes from 3 to 9 weeks. It definitely takes longer than 3-9 weeks; I'd say to have the goatee long enough you're looking at at least a year
I really hate to be the one to have to tell you this, but when you shave your face, the hair grows back thicker, it sounds to me like your starting to grow a beard. You now have two options, either let it grow, but try to avoid kissing, or shave daily, but remember that when you get to that old age where you are unable to shave anymore, that you will more than likely grow a full on Amish beard. Good Luck and try not to cut yourself.
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You have to remember that you have DNA from both parents and it is possible you got a gene that doesn't allow for thick beards. Take a look at both sides of the family. It might be hormonal as well. You are young at 20 years old, so it is possible when you are older your beard will thicken.
it takes about an 1 hour and 32 minutes to get to Santa Barbara
how long does it take to grow a new layer of skin
how long does it take for a baby carp to grow full size
they take about 5 days to grow.