Feel duped. Had son circumcised but now pendulum appears to have swung other way. Why?

Remove too much skin. This may be due to removal of too much foreskin during the surgery. This can lead to bending of the foreskin with erections. See your urologist who did the surgery.
Do not fret. What ever you hear, more than 70% of us baby boys are still being circumcised to this very day. Slightly fewer in the liberal ne and the west coast. You did what you thought best and the "silent majority" still agree with you.