In Why Not. Once is Not to Make a Habit of It, vibrant colors dominate the canvas, with deep reds and yellows contrasting against cooler tones. The figures depicted are lively and expressive, likely representing a social scene in a Parisian café.

The setting is intimate, capturing the essence of nightlife in the late 19th century. Toulouse-Lautrec's characteristic style is evident in the fluid lines and dynamic poses of the characters. This painting is executed in oil on canvas, a medium that allows for rich texture and color depth. The dimensions are approximately 60 x 80 cm, making it a medium-sized work that invites close inspection.

The brushwork is loose yet deliberate, showcasing Toulouse-Lautrec's skill in capturing movement and emotion. The composition draws the viewer's eye through the arrangement of figures and the use of light. Henri de Toulouse-Lautrec was a key figure in the Post-Impressionist movement, known for his depictions of Parisian nightlife. This work, created in the 1890s, reflects his fascination with the social habits of the time.

An interesting fact about this painting is its title, which suggests a playful critique of indulgence, hinting at the artist's own struggles with excess. Toulouse-Lautrec's unique perspective on society continues to resonate in contemporary discussions about art and culture.