I keep getting bigger

I am 20 weeks in this picture and I feel as if I am getting bigger everyday. I had an Ultrasound done at 19 1/2 weeks and the twins are doing well and growing. We found out we are having a boy and a girl. What a blessing to have both. Seth and I were convinced we were having girls, so when we saw a boy in there, it came as a surprise. However, we couldn't be happier. Now we have to come up with boy names. Why are boy names so much harder?