The advantage of the secret code word is that your date is probably listening, and a lot of people don't have the confidence to straight up say "yo, this dude's pervy as fuck, get me out of here."

TL;DR: The code word's basic form is for people with difficulty handling social situations that need a confident figure of authority to take control of the situation and put them into a position where they feel safe and the situation is over. The extras are for people who feel they are in legitimate physical danger and can't get the privacy to use their phone, or don't feel safe enough to leave the building without explicit witnesses.

EDIT: The not TL;DR below

EDIT 2: Wow, my first reddit gold! Thank you very much mysterious stranger :)

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Most of what I say here can easily apply to both men and women.

If you were confident enough to just leave on your own, you would. Never underestimate just how creepy and fucked up people can be.

The problem is that creepers don't just sit there and smile while you do your thing and occasionally talk about sex at inappropriate moments. They follow you to the bathroom, in some cases even trying to go all the way in with you. All the way.

They try to look at your phone to guess your pass code from your finger movements and may absolutely start having a look through your messages and private data if you leave your phone on the table. Not in a subtle way, like when you forget to take it with you. They'll straight up pick up your phone if it's within reach and start looking like this is totally normal behaviour.

They could throw a public tantrum, or accuse you of physical abuse in front of other people to tear down your atmosphere of security in a public place by turning strangers against you.

If you try to get up and go to your car they don't sit there an say sorry things didn't work out. They get up and follow you and ignore anything you might say while trying to get into your car. Maybe because they're a rapist, or maybe because they're one of those people that think "no" means "I'm playing hard to get" which, when put into perspective, isn't that much different.

Getting to your car is also a gamble. If this is the kind of abusive creep that makes you feel physically threatened, they might be carrying a knife. Getting into that quiet parking lot at 10pm you've got about 3 seconds to cry for help before they stab you. So what do you prefer, to get raped in your own car, or stabbed in the kidney?

Maybe they're not the violent type. Maybe they're the even more dangerous type that'll follow you to your car to memorize your plates then show up at your house a month later to confess their love for you, start calling your work and impersonating you to get you fired, threaten your elderly parents or show up outside your childrens school to intimidate you into giving them sex, or another date.

Then there's the issue of social anxiety. I'm a guy who dates women, and I've met a lot of women who just don't know how to say no. You need to pick up on the subtle "I'm not interested" signs. It's pretty easy, if they start giving you dead end answers to your questions until you feel like you're running out of ways to keep the conversation alive without talking about the weather, then it's time to go.

This becomes a problem when the creep apparently has a six page fucking list of ice breaker questions to run through for the next hour and once that runs out, he decides you're "close" now and he starts asking what he really wants to know, like how you feel about anal sex and how many men you've slept with at once.

I've met some seriously psycho women in my time dating. Some of them I dated way longer than I should have, and others were so blatantly obvious that I got out of there at the first opportunity. This isn't an issue specific to men or anything.

But the guys I've seen or on a whole other level. Some girlfriends have shown me chat logs, messages, or just told me stories about dates they've had and holy shit. These are people that absolutely see their date as a new toy with an unfortunately difficult process to set up and get "working". If they buy you a drink then the financial transaction implies that they own you. If they take you out to dinner then you'll have sex with them after. If you go see a movie together then they're looking for a hand job in the back row.

If she doesn't put out on the first date, or turns down their early sexual advances politely, then she's a fucking stupid slut that doesn't deserve a real man. I mean Jesus, it's pretty horrible how quickly they can escalate from 0 to 100.