The social penetration model works by describing four stages of relationship development: orientation, exploratory affective exchange, affective exchange, and stable exchange. In each stage, the communication between the partners changes in terms of frequency, duration, intimacy, and diversity. To begin with, orientation is the initial stage where people exchange superficial and polite information, such as their names, occupations, hobbies, and preferences. The communication is usually brief, cautious, and conforming to social norms and expectations. As the relationship progresses to exploratory affective exchange, people start to share more personal and spontaneous information, such as their opinions, feelings, attitudes, and interests. The communication becomes more frequent, longer, and more varied at this stage but still avoids sensitive or controversial topics. The affective exchange is marked by a greater level of openness as people reveal more of their innermost thoughts, feelings, and values while expressing more affection, trust, and commitment. The communication becomes more intimate at this stage with frequent nonverbal cues such as eye contact, touch, and tone of voice. Lastly in the stable exchange stage there is a high level of intimacy where the communication becomes more stable, predictable and comfortable with more shared activities, goals and experiences.