My general philosophy is to ‘live and let live’.
It is perhaps difficult, if not impossible, for ‘straight’ people to understand the feelings of those involved in ‘same-sex’ relationships so you might say we are not equipped to pass a meaningful opinion.
However, it seems to me that with this group constituting such a small percentage of the overall population that this topic draws far more attention than it really deserves.
By all means let those of this persuasion enter into appropriate civil ceremonies for their security and comfort but please do not permit the marriage route which should be preserved for those for whom it was intended.
The sermon mentioned in this reference therefore is slightly ambivalent – though what else could be said?