France also having been SECAM might explain why russian retro-80's concerts[1][2] often feature "Emmanuelle" (1974, NSFW) K7s in their "do you remember" interludes?

[1] https://ru.wikipedia.org/wiki/Дискотека_80-х seems to be the main one, but it has competitors.

[2] from the 90s, but if the instigators of the US PMRC had ever seen eurodance like https://en.wikipedia.org/wiki/E-Rotic they'd have been clutching their pearls.

(the retro-encrypt screen's "pour en savoir+" mdr)