Ainea:
Again, you're reading into Romans what is NOT there. The FACT remains that homosexuallity is identified as the punishment NOT as the sin.
Whatever other acts you may conjecture Romans includes along with the specific one of IDOLATRY, "FOR THIS REASON" (reason in singular form) God' turns heterosexuals into homosexuals or as Paul PLAINLY states, "...For this reason God gave them over to degrading passions..."
And according to scientific observation* of Bighorn sheep in the wild engage in predominantly HOMOSEXUAL behavior 10 months out of the year.
*Mountain Sheep (Geist 1968:210-211 [tables 4-6]); 1971:152