I'm glad he brought up the casual sex topic. Stefan said something about it in his single mother video, but he didn't elaborate. He has an interesting way of looking at it. I've never thought of it in terms of an implied contract, but I think the implied contract could be debated.
When you take a candy bar from a store, the owner loses a candy bar, and you gain one. If you have sex with a girl, she gets pleasure and you do as well. So it isn't a direct comparison.
I think that Stefan may need to look at this topic again. I'm assuming based on his conclusions that he hasn't had much experience with casual sex. Finding a girl who is just looking to fuck with no strings attached isn't as rare as you might assume. If you are the most attractive and sociable guy at a given bar, there will be girls that are there with the sole intention of having casual sex with you.
To come to the conclusion that all girls looking for casual sex aren't upstanding moral people takes some very large leaps in logic.so Stefan might need to look closer into his line of logic on that as well.
First, it isn't true that you do not like someone just because you don't plan on seeing them again. I don't even know how he came to that conclusion. There are plenty of people that I like but don't plan on seeing again because I don't have time for everyone in the world that I like. And second, not every girl looking for sex is some whore with herpes. If you are an unattractive guy (both physically and mentally/socially), and she wants casual sex, you better be careful especially if she is out of your league. However, if you are extremely attractive and she wants to have sex, she might be very picky about her partners, and you are one of the few that fit her criteria. I'm not just speaking theoretically, I'm speaking from experience. I've come across this countless times. The girls I have sex casual sex with probably have had less than 5 or 10 sexual partners their entire lives. Maybe 1 fling a year, and none of them were crazy stalker types like Stefan suggested...
But I see his point about being honest, I just think it can be debated about whether it is an implied contract. I've never met a girl who assumed there was supposed to be a long term relationship after having sex. They know what it is by default unless it is stated otherwise. That is just my personal experience, however, so I'm not saying that is the rule or if it is even over 50% so it is debatable.
I'm very disappointed in Stefan's handling of this topic. He definitely needs to do more research and thinking about it before addressing it again, and hopefully he can address these issues that me and and other commenters have brought up with his shaky logic.