The VCUG isn’t a fun test, that’s for sure. It takes quite a while (several weeks) for the inflammation to go down sometimes. It will though, the penis is rather resilient when it comes to healing.
As for the sexual function after a urethroplasty, it’s rare that there’s any long term problems with it these days. A good surgeon will know how to avoid the nerves that can affect erections. Much of the problems that occur after surgery in terms of curvature and ED go away after the tissue has fully healed, which can be anywhere from 3-9 months in most cases. Penile strictures have a higher chance of slight curvature being permanent, but bulbar locations causing it are very uncommon with modern techniques.
Ejaculation problems are rare except in cases of previous prostate surgery or radiation, but that has little to do with the surgery, and more to do with what caused the stricture in the first place.
Over 90% of surgeries have a complete cure, without permanent side-effects.
Clayton