Eh it's widely known that they do stuff like this but generally hidden and indirect, ment to be more like easter eggs for adults etc..
Nothing a child under 4-6 would notice most of the time.
Watch snow white or alice in wonderland, or even go to epcot//disney world and go thru some of the rides there is alot of stuff hidden in the deco//walls there as well.
You'll find alot of trippy stuff and some things that are directly drug related in backgrounds.. walls.. and other things if you pay attention and look for it.
The sex related imagery in things doesn't suprise me, tho I don't recall older instances of things like that from "older" disney films/toons.