young guys are lazy

Not so. It's not about being "lazy" but that the beard grows a little too quickly and at some point it's discouraging for guys to shave it off as it's one of the annoyances of being a guy. I personally hate having facial hair and wish I didn't but I can't do anything about that (Well, medically I could but I won't).

It just takes about 10-20mins to shave what grows in a week or two.