I was asked if anal sex is a sin, and I could not find any biblical reference of indication either way. The closest I could find was Ro. 1:27; "committing indecent acts (the shameless deed NASB)." However, "the unseemliness [working]" (Strongs 2716, katergazomai: to work out) only seems to indicate that shameful (homosexual) acts were completed. But in the context of Ro. 1:24-32, does verse 27 refer to acts which would be shameful no matter who they were performed with, or does it refer to all acts in the homosexual sense as shameful?