No, in fact, it almost seems like they encourage it. In patch 12, they made it so we could make a Mods folder in The Sims 3 folder in your documents. They even told us how to get mods working.
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There is a mod that removes blurs, i do not have it but type sims 3 nude mod or try mod the sims 3.
You can buy the nude mod or you can find it in the sims 3 exchange.
The Sims 3 censor blur can be removed by using a mod. A popular mod to use is the Mosaic-blur removal.
There is no cheat, but there may be a mod.
You can find a lot over at Mod the Sims. You require a Pose Player to use them. You can also find the Pose Player at Mod the Sims