What is one of the key behaviors that can be observed in a person during onset intoxication?

One of the key behaviors observed during the onset of intoxication is over-friendliness. As alcohol begins to affect a person's system, it tends to lower inhibitions and can lead to individuals becoming more talkative, open, and affectionate towards others. This increased sociability is often characterized by a greater willingness to engage in conversations, make new friends, or express warmth and camaraderie, which are typical signs of someone beginning to feel the effects of alcohol consumption.

In contrast, other behaviors like increased argumentative behavior or withdrawal from social interactions can indicate more advanced stages of intoxication or may be influenced by underlying personality traits or external circumstances. Moreover, a flushed face is a physical change that may occur but does not directly reflect the social behaviors associated with the initial phases of alcohol's effects. The focus on increased friendliness underscores how alcohol can impact social dynamics in the early stages of drinking, making it a key behavior to recognize in such situations.