I wouldn't recommend it for you or the kids, but Flesh Gordon was a howler when I snuck in to see it as a teen in 1974. Flesh had to do battle Emperor Wang (the Perverted) and all his evil minions. OK - now I just feel dirty. Well, it's not like I would admit to having seen Fritz the Cat.
lol, at the time i thought Flash (not Flesh) Gordon itself was rather a bit on the risque side. Or at least a couple scenes from what i recall. But then, i was only 10 or so, and so viewed such scenes as nothing more than boring breaks in the action. Perhaps a reverse view would be true today.....