I remember Quest for Glory 2 from Sierra Games had a sequence where you could purchase X-Ray glasses and you could wear them to see Zayishah, one of the central characters, naked in the game (rather pixelated it must be said).
IIRC Larry didn't get much more than a mildly risque hot tub shot and some heavily censored humping. Didn't it have a black bar that bounced up and down or something like that? It was a comedy game first and porn game a distant second.
https://en.wikipedia.org/wiki/Leisure_Suit_Larry