sounds like you have NOT sat down and talked with son.
Lightning bolts are dont care...really!
even if your not completely secure with your own sexuality and possibly homophobic or just fearful of the topic you two need to talk. Parents should be 101% supportive of their children, else you leave it up to us, strangers on the internet. Or they roll around till they figure it out themselves.
the best times for me to talk to my daughter was on a long drive, I was driving. We got into the habit of discussing lots of things I did not know about. The most important thing was we two felt each others voices. can you hold hands?
-He is not going to change who he is. Sexuality is some what fluid, try not to have him put a label on it too much but it is a priority HE figure it out. Less he gets in a straight marriage with children and he decides he is gay.
-Watching gay porn dosnt define anything, being gay is being able to have a successful same sex relationship. Straight or gay relationships are much the same, sex is part of a relationship but there is much more. He will feel totally the same about his same sex partner as you would about your partner.
-Being gay should not limit your love for him. Encourage him to bring his boy friends by for dinner, thanks giving and christmas. Go with him to gay pride on family day.
-Being gay should not limit his options in his life, he can still experience being a parent, education, a career and the love of a partner.
-of age, steady boy friend & your son MUST sleep together in your home because they are in a relationship, the same as you the husband wife.
How would your son rank you as a parent; do a search for an old post I did "QA the parenting you recieve".... link:
http://gayspeak.com/showthread.php?t=19756