Isn't it balance? Taking all scripture (including the above) in context and in harmony...the same Bible that says love and don't judge, also says don't commit adultery, condemns men lying with men, women burning in lust for each other, etc...as I understand, one scripture doesn't cancel the other...they co-exist. IMO, love and accept the sinner (all of us) while still heeding Jesus' words to "go and sin no more"...although personally, I'm not there yet :).
I don't understand it completely as just "natural" vs. "un-natural"...it's more about what Spirit revealed scripture says about it. As far as I know, scripture doesn't say this ("genetic defects such as conjoined twins [etc]..just because they fall outside of what man calls natural") is sin, but it does specifically speak against pursuing the behavior/acts of homosexuality, as well as many of the things my weak flesh does. Thank God He's merciful.
God's blessing, James.