I think the seahorse analogy is great.
I think pregnant trans men are wonderful figures in our world, signifying perhaps the greatest show of fatherly love, but obviously it can be very troublesome, especially for those with dysphoria. No one uncomfortable with the idea should have to suffer through it. There are cismen who would kill to be able to carry their own children, however, and although it is as of now impossible for cismen to carry children, I think the idea of such a nurturing father figure, rather than always a mother figure, is beautiful, and it is only our society's prejudice that makes the idea of a pregnant man "blasphemous" or whatever they think it is.
Reading Kyril's experience made me realize that I'd be about the same, if I had to go through a pregnancy. I just don't have the ability to cope through that. It just goes to show what a traumatic thing it can be.
Anyway, this thread really makes you think. Fathers are not very prominent figures in childrens' lives in the nuclear family, and I think the seahorse is a great symbol for real fatherhood.