Both of my boys (9 and 6 y/o) were circumcised. We're pregnant again and if it's a boy he'll be circumcised as well.
Barbaric? No. Painful? Heck, yes. That's why an entire city was wiped out by 2 men. Can you imagine how much pain you'd have to be in for an entire city to say, "Yes, please kill us all." Ladies, I'll give you childbirth as the most painful thing in the world, but circumcision is definitely 2nd.
The argument that it was only for the Jews or under the Old Covenant is debatable and the topic of numerous threads already, so I'm not going to go there. But it is a sign and a reminder of God's covenant with His people. My decision to let my sons go through the pain of it is a reminder of my submission to God no matter what. It is a sign and a reminder to my sons for the rest of their life that their parents committed them to God from the beginning and that they are set apart as God's for the rest of their lives.
Submission to God is rarely easy. It hurts our "flesh", a lot. But it also provides a very good pictures of what it means to have God circumcise our heart.