First of all, the title is based on such a flimsy premise it would be better left off.
Other than that, have you seen this one? This is not for general consumption but I think you would really like it. It is a BBC adaptation of an American novel about a young man who "comes out" to his parents. We can clearly see that his father is also a homosexual. Good performances all around. I got it from the library, so I'm sure it's available in catalogs and for rental.