What an insane question to ask someone!

I guess, but I can infer two things from this comic:

  • The two girls know each other well enough and are close enough to be familiar with each other’s stuff.
  • For the same reason as above, one girl knows the other is a little… Um… Shall we say… “needy”.
  • 5-Ish Art has done enough comics about sucking off her husband that I think you’d have to know her for like an hour before that becomes apparent.