Generally, how does a man feels being a father for the first time?

Supposedly my male cousin wasn't the type to care for babies too much and liked his freedom when he was younger. When his then fiance (now wife) gave birth 7 months ago and it was a baby girl, he melted. For a tough man, that's the first time I saw breaking down in tears when he held the baby for the first time. I was surprised. He literally cried.

I can only tell from a woman's point of view of growing a human inside, feeling their kicks, seeing the human coming out and the nurse giving you the baby in a warm blanket. What about for you men that have kids? How does it feels like being a first time dad? What's your experience like?

Updates
12 d
I had known him as a tough steel, hard to break and yet he melted.
Generally, how does a man feels being a father for the first time?
Post Opinion