Design a T-shirt that combines a humorous sports phrase with a watercolor aesthetic. Use warm colors to create an inviting and energetic feel. The phrase "I Workout Just to Eat Pizza" should be the focal point, rendered in a fun, eye-catching font. Incorporate watercolor illustrations of pizza slices and sports gear, such as dumbbells or running shoes, around the text. The background should feature a soft watercolor wash that complements the warm color palette, adding depth and vibrancy to the design. This T-shirt should appeal to professionals who appreciate humor in their athletic pursuits.