Men may stare at cleavage because they are romantically interested in the person.
According to the reference, when men are interested in a romantic partner, their eyes are often drawn to the breasts and hips, with occasional glances at the head. This suggests that visual cues associated with these areas can be attractive or stimulating.
- Romantic Interest: A primary reason men stare is that they are attracted to and interested in a romantic relationship with the person. The reference explicitly mentions that men's eyes focus on breasts and hips when they desire a romantic connection.
Therefore, cleavage can act as a visual stimulus that captures attention, especially when romantic interest is present.