"Because it's not fair to you that I don't want kids." He... Thinks that's the reason. It's hard to put into words, other than it seemed like a good idea at the time. "And Mutti and Vati will be happy to have a grandkid to spoil. I don't know." Gilbert rubs his face with his hand. What made him decide to do this indeed. Excellent question, he's glad you asked, do be sure to tell him what the answer is when you find out.