Maybe you should read the context of it to see what word he uses to link the 2 verses together "'likewise"
Rom 1:26For this cause God gave them up unto vile affections: for even their women did change the natural use into that which is against nature:
Do you see there are 2 positions here he is emphasising , natural use changed or exchanged for the unnatural,..... could he be talking about the sexual union bewteen 2 women , turning from the natural to the unnatural practice without actually saying lesbian.
The vile =means guilt,shame, disgrace,dishonor, reproach, what affections are ,....
vile and God gave them over to their passions.
What's the natural use(instinct and what's against nature........ and the next verse ,LIKEWISE ... men leaving the women ...men with men.
And
likewise also the men, leaving the natural use of the woman, burned in their lust one toward another;
men with men working that which is unseemly, and receiving in themselves that recompence of their error which was meet.