When talking to her, there should be a dialogue option like 'Mistress Bonnie...' or something like that. When you click on it, you should have the option to pick Toilet if you've seen the scene already. If not, check that your toggle is on, as using the new version flipped the toggle off for me.
You need to have the gas mask equipped. I think it can be bought in the pawn shop.
You can't take socks from rooms if I remember correctly. Only panties and shoes. For each, you need to have the respective quest active, and the guys that give that quest are next to eachother on the map between the school entrance and the female dormitory.
