[Sherman Logan]

Gibbon good enough for you?

The homosexual interests of Roman emperors is familiar to many modern readers. In fact, Edward Gibbon wrote in his History of the Decline and Fall of the Roman Empire that “of the first fifteen emperors, Claudius was the only one whose taste in love was entirely correct,” that is, in Gibbons’ view, heterosexual…

Decline and Fall: Vol. 1, ch. II, footnote 31.

http://books.google.com/books?id=1ha9GgWNmy0C&pg=PA202&lpg=PA202&dq=suetonius+claudius+homosexuality&source=bl&ots=MKJDjbwUDl&sig=UaUainn0lOy63HcjPdl2avjkpIs&hl=en&sa=X&ei=NjVaUMb2N4n49QSH-4GwDA&ved=0CEEQ6AEwBA#v=onepage&q=suetonius%20claudius%20homosexuality&f=false

Gibbon might, of course, have been misinformed, and it is certain that accusations of this type were part of the common stock of Roman denigration of political opponents. So you can believe what you like.

[Antoninus]

That's a tertiary source you're citing there which is uninteresting to me. This source cites Gibbon, a secondary source, who himself is far from unbiased, given that his primary reason for writing was to create/uphold a Protestant/Anglo view of ancient history and refute the Catholic/Latin view. Thus, he was happy to portray Romans (the ancestors of the Italian Popes) as homosexuals.

That said, it is certainly likely that several of the early emperors committed homosexual acts, given that a few were absolute monsters. But the evidence for a claim that only 1 out of 15 were "correct" in their affections is pretty scanty.