Your words:
He leaned over to me and whispered "that girl just made my pee pee get a little hard", "but, don't tell anyone, ok mom?"
How could he have known to say this without being told this by someone.
Could he have been sexually touched or abused by someone?
The comment saying "don't tell anyone, ok mom" sounds like something an abuser would tell a child.
If I were you, I would make a list of who he has been around recently and maybe you can figure out where he learned this behavior and where he learned to repeat the comments he made.
See a Pediatric doctor for more help.
Exposure to porn is too available these days. I believe a normally curious child has too much easy access these days. There are filters to protect your children on the home computer or phones. I would use them.
Outside of the fact that he has been sitting there for quite a while and now has to go to the bathroom - that is all you should read into this situation.
I just had a similar situation with my 5 year old we were watching a movie where this girl got married with her fiance and they kissed at the end of the movie my 5 yr. Old boy said to me "mommy my pee pee got big when I saw them kissing but dont tell anyone because they will asked me about it". What? I Tried not to make a big deal, but I don't know how to handle this situation at this age.
I had a similar experience with my 5 yrs old son. The mother called me over the phone to inform me that my son had a litle erection and showed this to his mum.The surprising thing is that he told his mum that "my penis is in love" There was no way a 5 year old would have been able to know or say this if he had not been told or taken through the process of arousal and the conditions for having an arousal.
I flashed back on his recent activities and discovered that he had been going to my neighour's house who had a 10yr old son and an 8yr old girl.
I am very sure that the boy is responsible for this strange behaviour in my son because my son reprted him to be kissing my 3yr old gaughter behind a curtain sometimes a go when they came to my flat to play with my kids.
I have placed an embargo on him from goiing to my neigbor and introdued a scheduled all-kids-alone TV programs
The only thing my husband and I can come up with is when he was 3 years old I couldn't make it home on time to watch him before my husband had to leave. There was about a 2 hour period that we agreed to let him be with my 17 year old step son and I had suspician that the 17 year old had porn on in front of him. I thought that he would forget what he saw by now (if anything). I know their was something, but can't get the truth out my step son of course. (He was removed from our home immediately) Other than that he is with us all the time. He attended day care as well. I guess my question for today would be....... could he possibly remember from two years ago? And the other thing is TV. We are trying to pay more attention. I guess we are stupid to think that children are not allowed to watch the Indy 500? What a joke!
I do not believe this is normal behavior of such a young child. This is a learned behavior from what he has been exposed to. This is very alarming to have a 5 yr old boy say and do stuff of this nature. This type of behavior really needs to be stopped and constant reminders of good vs bad behavior. Could he have picked this up from elsewhere? Like an older cousin, father, uncle, etc? Maybe not letting him watch this type of programming will help him forget. He should be watching kid appropriate shows or if your gonna watch these types of programs with him, he needs to have this explain to him as to where he will understand right from wrong. You are his parent and these decisions are up to you as to what he does for activities. His access to the t.v. maybe should be limited where he can be monitored by you or another adult. Don't let him get away with this type of behavior as it will only get worse. Also call him on his mistakes and talk to him endlessly. He will eventually understand. Good Luck and take care.