I believe we forgot one very important aspect about Jynx's Kissing shenanigans: Vital Spirit Scarf Primeape. Lovely Kiss becomes a somewhat risky move for Jynx, Scarf or not, as Primeape can switch in and snag momentum with U-turn, putting further pressure on Jynx if SR is on the field.
This is a very risky move, however. If you mispredict Jynx using Lovely Kiss as you bring in Primeape, you probably just lost your Primeape.
248 SpA Jynx Ice Beam vs. 0 HP / 0 SpD Primeape: 190-225 (70.11 - 83.02%) -- guaranteed 2HKO
248 SpA Life Orb Jynx Ice Beam vs. 0 HP / 0 SpD Primeape: 247-292 (91.14 - 107.74%) -- 81.25% chance to OHKO after Stealth Rock
248 SpA Jynx Psychic vs. 0 HP / 0 SpD Primeape: 360-426 (132.84 - 157.19%) -- guaranteed OHKO
Also, if you bring in Primeape as Jynx uses Substitute, you're in a pretty crappy situation.
You bring in Primeape.
Jynx uses Substitute.
Primeape uses U-turn.
X is brought in.
Jynx uses Substitute.
or
You bring in Primeape.
Jynx uses Substitute.
Primeape uses Close Combat.
Jynx uses Substitute.
Primeape uses Close Combat.
Jynx uses Ice Beam.
Primeape is dead.
You gotta be at full health, ensure Jynx is not running Psychic, and hit it with Stone Edge two times if you want to guarantee you revenge SubJynx. For the other Jynx sets, you gotta be pretty damn sure it's going to use Lovely Kiss if you want to revenge it with Primeape, otherwise one of the best Jynx checks will be destroyed.