nope sorry - it's not - SSM is about the union of 2 people - nothing to do with unnatural sex -
and, on the unnatural part -
you might want to catch up on the research as well --
try looking at genetics and homosexuality - you will see - if you can put aside your homophobic emotions that the research leads us to what appears that homosexuality is very normal - in both sexes - and natural
more research is needed to tell us exactly what roles in our survival and evolution it plays - but, play a part - it most certainly does
if you need some links I can find them - but, there is a lot out there for genetics and probably quite a bit for brain patterns as well.