There are, of course, a few different elf characters in Interspecies Reviewers. However, Zel’s the only one of them who is in the Studio and available for Ask appearances, so I assumed he was who this question was referring to. In the series he seems pretty disgusted by any sort of homosexuality (or, at the very least, participating in it), but everyone in the studio is pansexual so that’s less of a concern now. As much of a horndog as he canonically is, a pan Zel giving in to Elza’s wiles seems perfectly reasonable to me.