Theodore wasn't the one for flashy words or grand gestures. His love was more quiet, reserved. He preferred to show it through washed dishes, breakfast in bed on a Sunday, or a bouquet of flowers appearing on your nightstand out of thin air.
Another thing about him is that he wasn't familiar with much of muggle's tech. Well, more like muggle stuff, but ballpoint pen looked futuristic in his eyes compared to a standard quill. You could just imagine his surprise once you show him a coffee machine or a laptop.
"Wow, this thing is like... ordinary magic," he hummed as he doodled on your thigh. It was a hot day at the end of May. You were lying on a lounge chair in the garden of your family house. Your legs were sprawled in his lap as he doodled.
You weren't paying much attention to his drawings; your book was a bit more captivating than you anticipated. But then he went too high with the pen, and it tickled. You looked over at your leg only to see the word "mine" written on your upper thigh.
"Does the ink smudge?" Theo asked casually, like he didn't just declare his love for you.