completely stupid thought

Emma
So I can't sleep, which I reeeally should since it's 3 am. But anyway, I had this really weird thought that I am now sharing with you: 
-
If a person comes out as gay, it's called "coming out of the closet", right? How about if this person later in life wakes up one morning realizing that they're not gay; when announcing this, do they come out of the closet again or just go back in? 
-
I know the "being in the closet" means that your like hiding your gayness or whatever (I know gayness isn't a word and I'm sorry if it's incorrect or hurts anyone, I'm tired, k?) but can you go back into the closet to hide your non-gayness? (Straightness, if you will)