Homosexuality in Islam (2) : Letter pt 6

...being the 6th part of a letter to a Muslim convert friend.
But why should we turn to the ahadith in the first place? Why do Muslims feel the need to go beyond the Qur’an for guidance on this issue? It is because surely, like so many other areas, the Qur’an leaves its readers unsure.
It condemns homosexuality in the stories about Lot, which were told during the Meccan period, but in the Medinan period, Sura 4:15-16, the only reference that seems to come close to dealing with this sin, is so ambiguous that it seems that Muslim scholars cannot reach a consensus on its meaning.