Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to find out if he likes you [title] Know how physical attraction works. [step] Your brain chemistry is responsible for who and what you're attracted to. In fact, according to experts, physical attraction works a lot like addiction: both stimulate brain chemicals like dopamine and oxytocin.

Ending1: Even if he's not into you, it doesn't mean there's anything wrong with you: it's all down to the chemicals. [substeps] Research suggests that our brains can tell within one second whether we're physically attracted to someone or not. Ending2: In turn, your body releases hormones like endorphins and serotonin that can help enhance physical attractiveness. When you have one of these hormones, you'll be compelled to act on it. Ending3: Without these chemicals in your body, you can't stop thinking about your crush. [substeps] Subconsciously you feel a magnetic attraction towards your crush. Ending4: Stimulation of these chemicals causes sexual attraction and energy boosting responses to accompany the actions. Moreover, single men are attracted to people with simply a simple sort of tomboy desire.

Answer format: ending1/ending2/ending3/ending4