Happy Dads Day
By definition a man becomes a father when one of his sperm fertilizes an egg. It takes a lot more to become a dad.
I once overheard a young man say that he was going to visit "the sperm". When I asked he said he visited the sperm but he lived with his dad. It is a shame that he looked on his father with such disdain, but then knowing this child as I did I assume that he had just cause for his feelings. Perhaps his father had been only that--or as he said the supplying sperm.
To evolve from being a father to a dad one needs to love and nurture their children. They need to be there for them, to encourage, praise, and support them throughout life.