When a strategically placed dollop of KY Jelly is a standard part of your "getting ready" ritual.
When you drive past one of those brown "tourist places of interest" signs that says WATER SPORTS and you realise you have been ruined forever.
When you can work out the lighting/banks of switches in a hotel room in a few seconds flat ... what is it with hotel lighting ?
When you have the discipline/determination to endure lying in the dark, wide awake, knowing you have hours to go, next to a stranger who will want sex with you again in the morning, once more, before your jubilant exit with a bulky envelope.
When what was once conversation becomes your practised "set routine".
When you dread meeting someone new in case they don't like you.
When you buy waterproof mascara so it doesn't look as though you've been crying after a gruelling blow job.
When one of your major concerns about having a car accident is that the contents of your bag will give the game away (rather than worrying about whether you survive the accident).