I will have to go with KJV.
No disrespect, but to me,angels having sex is more like a cartoon .
Greek mythology at best
[KJV]
Jude 1:6; And
the angels which kept not their first estate, but left their own habitation, he hath reserved in everlasting chains under darkness unto the judgment of the great day.
Jude 1:7;
Even as Sodom and Gomorrha, and the cities about them
in like manner, giving themselves over to fornication, and going after strange flesh, are set forth for an example, suffering the vengeance of eternal fire.
In context we are talking about angels here. "Just as" Sodom and Gomorrah".... what was the sin of Sodom and Gomorrah? .... they ( the angels ) "in the same way" as these ( the inhabitants of Sodom and Gomorrah ) indulged in gross
( sexual ) immorality and went after strange flesh. What is "strange flesh"? A type of fleshly being that is not the same as you. What is fornication? You can't commit fornication unless you're having sex.
AMPC) [The wicked are sentenced to suffer]
just as Sodom and Gomorrah and the adjacent towns--which
likewise gave themselves over to impurity and indulged in unnatural vice and
sensual perversity--are laid out [in plain sight] as an exhibit of perpetual punishment [to warn] of everlasting fire. [Genesis 19]
(ASV)
Even as Sodom and Gomorrah, and the cities about them, having
in like manner with these given themselves over to
fornication and gone after strange flesh, are set forth as an example, suffering the punishment of eternal fire.
(BSB)
In like manner, Sodom and Gomorrah and the cities around them, who indulged in
sexual immorality and pursued strange flesh, are on display as an example of those who sustain the punishment of eternal fire.
(Greek NT) ὡς Σόδομα καὶ Γόμορρα καὶ αἱ περὶ αὐτὰς πόλεις τὸν ὅμοιον τούτοις τρόπον ἐκπορνεύσασαι καὶ ἀπελθοῦσαι ὀπίσω σαρκὸς ἑτέρας πρόκεινται δεῖγμα, πυρὸς αἰωνίου δίκην ὑπέχουσαι.
(Greek NT BYZ+) ωςG5613 ADV σοδομαG4670 N-NPN καιG2532 CONJ γομορραG1116 N-NSF καιG2532 CONJ αιG3588 T-NPF περιG4012 PREP αυταςG846 P-APF πολειςG4172 N-NPF τονG3588 T-ASM ομοιονG3664 A-ASM τουτοιςG3778 D-DPM τροπονG5158 N-ASM εκπορνευσασαιG1608 V-AAP-NPF καιG2532 CONJ απελθουσαιG565 V-2AAP-NPF οπισωG3694 ADV σαρκοςG4561 N-GSF ετεραςG2087 A-GSF προκεινταιG4295 V-PNI-3P δειγμαG1164 N-ASN πυροςG4442 N-GSN αιωνιουG166 A-GSN δικηνG1349 N-ASF υπεχουσαιG5254 V-PAP-NPF
(Greek NT TR+) ωςG5613 ADV σοδομαG4670 N-NPN καιG2532 CONJ γομορραG1116 N-NSF καιG2532 CONJ αιG3588 T-NPF περιG4012 PREP αυταςG846 P-APF πολειςG4172 N-NPF τονG3588 T-ASM ομοιονG3664 A-ASM τουτοιςG3778 D-DPM τροπονG5158 N-ASM εκπορνευσασαιG1608 V-AAP-NPF καιG2532 CONJ απελθουσαιG565 V-2AAP-NPF οπισωG3694 ADV σαρκοςG4561 N-GSF ετεραςG2087 A-GSF προκεινταιG4295 V-PNI-3P δειγμαG1164 N-ASN πυροςG4442 N-GSN αιωνιουG166 A-GSN δικηνG1349 N-ASF υπεχουσαιG5254 V-PAP-NPF
(KJV)
Even as Sodom and Gomorrha, and the cities about them
in like manner, giving themselves over to
fornication, and going after strange flesh, are set forth for an example, suffering the vengeance of eternal fire.
(KJV+) Even asG5613 SodomG4670 andG2532 Gomorrha,G1116 andG2532 theG3588 citiesG4172 aboutG4012 themG846 in like manner,G3664 G5158 giving themselves over to fornication,G1608 andG2532 goingG565 afterG3694 strangeG2087 flesh,G4561 are set forthG4295 for an example,G1164 sufferingG5254 the vengeanceG1349 of eternalG166 fire.G4442
(MKJV) as Sodom and Gomorrah, and the cities around them, in like manner to these, committing
fornication, and going away after other flesh, laid down an example before-times, undergoing vengeance of everlasting fire.
(NAS77)
Just as Sodom and Gomorrah and the cities around them, since they
in the same way as these indulged in gross immorality and went after strange flesh, are exhibited as an example, in undergoing the punishment of eternal fire.
(NAS95) just as Sodom and Gomorrah and the cities around them, since they in the same way as these indulged in gross immorality and went after strange flesh, are exhibited as an example in undergoing the punishment of eternal fire.
(NIV)
In a similar way, Sodom and Gomorrah and the surrounding towns gave themselves up to sexual immorality and perversion. They serve as an example of those who suffer the punishment of eternal fire.
(NKJV)
as Sodom and Gomorrah, and the cities around them
in a similar manner to these, having given themselves over to sexual immorality and gone after strange flesh, are set forth as an example, suffering the vengeance of eternal fire.
Practically every version says... "just as" or "in the same way" as the people of Sodom and Gomorrah. Let us look at the original Greek also,
The word that the King James translates as fornication here is...
ἐκπορνεύω
ekporneuō
ek-porn-yoo'-o
From G1537 and G4203; to be utterly unchaste: - give self over to fornication.
This is where the word "pornography" comes from. There is no denying it has to do with sex.