A straight-up, detailed factual reply, on Solo? I'm in shock.
I'll lower the tone for a minute and say that to me it sounds like Hogg and Morrissey were 'friends with benefits', in which case the decision to leave him out of the autobiography probably makes sense. Whatever they were, it involved Hogg going "trawling" for men in bars during the tour, and usually always picking someone up. I can't imagine Morrissey putting up with that situation for a prolonged period if they were an item, but who knows.