Socks
First panel titled “Men use colourful socks”: an image of a Triangle-person giving thumbs-up, grinning broadly and wearing matched yellow-blue socks with smiley faces.
Second panel titled “Because otherwise they struggle”: the same person is now confused, wearing one grey sock with “+” design, and another grey sock with “.” design.
Third final panel titled “To keep them matched!”: The same person is wearing two grey socks with “+” design, but one is shorter than the other.
It is the practical choice!