As I am the mom of a girl, I cannot help you with the penile adhesion part of your concern, but I did want to address your concern over anesthesia. My daughter underwent general anesthesia when she was just 17 days old, at 8 weeks old, and at 10 months old; she also had "twilight" anesthesia at 14 weeks old. In all cases, her recovery was carefully managed by the hospital staff, and she did beautifully. The only small snag occurred about five days out from the surgery at 10 months old, when she developed night terrors for about five nights as the last of the anesthesia and heavier pain meds left her system.
That said, I know how hard it is to submit your baby to surgery, so I think that you are right to ask questions and gather some advice. Best wishes to all of you.
Jennifer