Like
sneezy_of_tie said, if your holes ache too much that bathroom can kill you (i didn't know that it was only the ass soreness that caused that tho ), is because it smells really bad (the explains you why you passed out).
So to fix that try to not enter the bathroom while crawling. And if you are standing, try to not enter when your soreness is brown colored (this is max sorenes, or 10, like
sneezy_of_tie said).
You could wait a little bit, or use a lube (type "purloin lube", if you dont have one).
EDIT: man, i love tagging!! God bless the person that taught me