Hmm. Perhaps Rock Hudson was not bothered playing a heterosexual love scene because he was secure in his sexuality.
It always seemed to me that certain actors, among them Rock Hudson, Raymond Burr, and Cary Grant behaved slightly strangely around women characters in their films and t.v. shows and were oddly unconvincing in love scenes, if any. This was long before I ever even heard rumors about those actors. Now, I know why they were unconvincing.