An option for actions in a situation where there are suspicions about the girl's commercialism.
Most often, such suspicions appear, of course, when ordering something in a cafe. Usually it happens like this: the waiter came up, she ordered first, after which she "kindly" offers to place an order for you. So the girls bypass the issue of paying the bill, because if here you start expressing a desire to share it ... Well, the prospects for productive communication will decrease. I have nothing against paying the bill for a girl and this behavior can often be without malicious intent. But sometimes it still happens to him. Therefore, I give you a universal phrase for verification: "well, then next time you treat you." Naturally, this should not be said on a serious face, but with a touch of irony and a smile - this should not look like an ultimatum. By the reaction of the girl, you will understand her mood for communication. In addition, you set boundaries with this.