"He peed in his mouth!"
Boys often let loose as soon as they're uncovered, and the stream can have surprising reach. Even with a direct hit to his face, very little urine actually gets in a baby's mouth, says Dr. Simpson. Plus, baby pee contains very little bacteria. You can always offer him some formula or breast milk as a quick rinse. Either way, take it as a good sign: A strong stream is a sign that things are working right down there.
"Um, he has erections...often."
Erections are a natural result of the touching that happens during diaper changes, and it's perfectly normal for him to have them -- even if he's a day old. You may want to take cover, though: Pee often follows.
"He doesn't appear to be fully loaded."
Undescended testicles are fairly common: As many as 4 percent of full-term boys and many more preemies may have only one detectable testicle in their scrotum. Usually, the issue resolves itself by age 1, but your doctor will monitor the journey.