Ask some sharp questions after the second date. If you get hooked up with someone, such as through the badoo dating app, or after a date with a longtime friend after a meeting with your mutual friends, you don't need to report the next day. A necessary condition for a the one time act is that it requires little of us. However, if you are stuck in a repeating, unrestrained hookup pattern, you need to establish some boundaries, especially when you see each other outside the bedroom. Then, if you are still playing this kind of casual games without attachments, then make some more specific rules and acknowledge that this will not be the last time you talk about your affair dating partner. After all, casual hookup does require some work.
Don't stay overnight. Whether you like it or not, prolonged closeness leads to intimacy. If you stay with someone long enough, you will become friends, then you will become friends who often sleep together and spend the next day together, and then bang. The next thing you know, you give them a gift for anniversary. I'm not suggesting that you pick up your pants and run away from them. I just said that breakfast is intimate which is way more than casual. If you don't want to give them wrong idea, try to avoid that.
Looked at the room. Most NSA hookups don't start like this: One person walks in front of another and asks, "Will you have casual date tonight with no strings attached?" However, in a casual relationship, some adult affair finders may never break up with you explicitly. They may never tell you that they don't want you to stay after that. If they are your friends or acquaintances, after you have slept, you may need to renegotiate your friendship. You may need to deal with strange situations with FWB dating, such as what role you played on their birthday. Part of the agreement is that because things are very casual, many exchanges are general and superficial emotions, rather than long.
Don't be weird. This is the vital rule. The two of you are not dating, you have no say what they do, what they wear, and who they are. You can only set your own boundaries, and hope that this also meets their expectations. Don't focus too much on their social activity. Don't disclose that the two of you are hooking up. Don't offer to pick up their parents at the airport in the first place, this will make the appointment repeat again. Just put in the right amount of effort, and have fun.