I could never. I read yaoi like a top-secret. I would be in my room, my back facing a wall in such a way that I can see the door but they can't see what I'm doing in my PC lol when you are from a brown household, there is no locks or knocks.
Yes, i usually read manga when I'm travelling in the bus or train, i also read it when I'm waiting at the dentist or something. But i don't read colourful smutty manwhas outside that would be a little embarrassing reply