Is it common for a 16 year-old boy to cry upon seeing and holding his newborn baby?

My teenaged brother got his girlfriend pregnant shortly after his 16th b-day and he's still 16. My mother, me and other family members are helping him too. He admitted they made a mistake but didn't want to leave like a coward like our grandfather and father did.

He continues staying by his girlfriend's side and visiting the her family; they're helping too. Upon seeing his baby girl and holding her, he started crying. He kept saying ''that's my girl, my rose, my beautiful girl'' and continue crying more. He got emotional.

Is this a common reaction among a 16 year-old boy?
Is it common for a 16 year-old boy to cry upon seeing and holding his newborn baby?
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