As a father of a gay son, how you handle his gayness?

If i'll be a father to a gay son, i might as well accept the fact that he is gay, it's not my fault or his fault that he is gay. I just accept who he is, and what kind of person he has become, after all he is my son.

Your son is gay whether you accept it or not. The best thing you can provide your son is leadership into adulthood. Teach him (by example) how to manage money, how to buy and take care of a car, how to finance, how to complete tax forms. If you want a positive relationship, get to know him and help him to get to know you. Don't pretend the "generation gap" doesn't exist. It does. Don't try to be his age. Don't expect him to be your age. Find mutual interests and enjoy them together. Don't forget to be yourself. Love your own mate and your own life.