There is an understandable reluctance to understanding that a son had "done" something sexual to his father.
I can understand why people dont really want to talk about such an event.

But from the way the text reads, and when you go and look at the other places in the Bible where the same phrase is used, the fact is, that this is how the Bible talks about this issue.

The bible is in fact telling us that some mighty weird gay-sex stuff took place in the story, like it or not its how the story reads...