They - both James and Louis - have dated or made out with so many girls during their time at Hogwarts. Nobody would ever suspect that secretly, they hide out in empty classrooms and barricade the door as much as they can, so that nobody can intrude on them.

They like it that way. Part of the draw for them to be with one another is the forbidden aspect; the thrill of nobody knowing, and how nobody should know, adds excitement to it.

They worry that one day they'll get caught. But they force themselves to think that day is far in the future, and they focus on the present instead.