Originally Posted by xblackmambax 81
Some of the Ego objects, like toilets for example, have multiple appearances; you just have to interact with one of them! If you missed all the toilets prior to the Burning Bush chapter, then using the toilet in Burning Bush will give you the Ego boost! Or if you used the toilet in Rude Awakening (like me) then there is no need to use any toilets afterwards.
EDIT: Nice guide, bennifer3000!
bennifer3000 didnt mention it in guide. dont blame me if i wrote that cause i kinda confuse. but it doesnt matter anymore i alrdy got all the achievements