1. SECRECY: Never say precisely what you are going to do.
2. INTIMACY: Always go alone.
3. INVISIBILITY: Make sure nobody sees you enter or come out.
4. SILENCE: Don’t give any indication upon your return as to what’s just occurred.
5. IDENTITY: Come back in the exact same configuration you left in.
6. SECURITY: Don’t reveal any clues that could give away the purpose of your mission.
7. SPEED: Never be away for more than five minutes, to avoid all suspicion.
8. COMPOSURE: Never show how you feel. Do not walk to the toilet with your buttocks clenched, for example.
9. MODESTY: Never brag about what’s gone one behind closed doors.