Jesus basically was against promiscuity. Therefore, any deviation from monogamy was wrong. That includes heterosexual promiscuity on the same plane as homosexual.
That get lost in all the holier than thou finger pointing.
There is no real evidence to say he existed, so to state what he was for or against is just pure speculation...
In Christian religions there exists Gospels of which do exist and state what I said they stated.
AFAIK and I'm pretty big on the subject, we have no contemporary witnesses to Jesus. The Gospels themselves, despite their claims, were not written until 80CE at the earliest with some coming a century later, with the possible exception of the letters of John of Patmos.