Except yes and no. They unlock then delete themselves at random or do not unlock at all. The BJ with my fave character never saved. The tentacles with her removed themselves after a game crash, even though i had saved several times prior. The dildo with a different npc just up and vanished at random. I saved, checked the gallery, ran some fights in the cave, checked the gallery and it was gone. Got it again now because I reloaded before I saved again.