'We know the doom of God falls justly upon those who practise such vices.'

Very well; and do you imagine you will escape God's doom, O man, you who judge those who practise such vices and do the same yourself?

So God has given them up, in their heart's lust, to sexual vice, to the dishonouring of their own bodies, ??25 since they have exchanged the truth of God for an untruth, worshipping and serving the creature rather than the Creator who is blessed for ever: Amen.

though they know God's decree that people who practise such vice deserve death, they not only do it themselves but applaud those who practise it.

you must not let sin have your members for the service of vice, you must dedicate yourselves to God as men who have been brought from death to life, dedicating your members to God for the service of righteousness.

(I use this human analogy to bring the truth home to your weak nature.) As you once dedicated your members to the service of vice and lawlessness, so now dedicate them to the service of righteousness that means consecration.