When a boy fancies a girl does he go bright red?

Yes, when a boy fancies a girl, he may blush and go bright red due to a rush of adrenaline and feelings of attraction. This physiological response is often triggered by nervousness or excitement in social situations involving the person he likes. Blushing is a common reaction that can indicate attraction or embarrassment. However, not all boys will react the same way; some may show their feelings differently.