LUST - in which you look upon an individual created in God's image as a mere object to be used for the gratification of your sexual urge ONLY -- as was also the case in Romans 1:27.
Note that the passage says the men burned in their "lust" for one another. This has nothing to do with love, devotion, monogamy or commitment. Lust is the opposite of Love in that it is selfish and focuses on gratification of self only. Whereas love is unselfish and gives based on the need and for the benefit of the receiver.