Please choose the correct ending to complete the given sentence: Relationships: [header] How to read an ex's body language [title] Study their smile. [step] A genuine smile is a good indicator that they are happy to see you. When there is a " eye twinkle " involved, this may be a smile in which the whole face, even their eyes, are engaged with you.

Ending1: If the smile leaves their face for a moment, they may be flattered. Looking at someone's smile will usually convey that even though the smile was fleeting, the back of their face still contains a joy to laugh at. Ending2: People's smiles are something that is often attributed to their social status or activities. A genuine smile is designed to show affection. Ending3: [substeps] Smiling might seem genuine, but the real thing to look for are their eyebrows, whether they are raised or lowered. This correlates to how old the person looks and how often. Ending4: On the other hand, a fake smile, such as a plastered, half-grin that lasts more than 5 seconds, likely indicates disinterest. [title] Notice any frowns that your ex makes.

Answer format: ending1/ending2/ending3/ending4