Just look. you will see a buldge or the boy is trying to hide it with a back pack or long shirt. If they wear boxers, it can be seen easily.
It will be HARD not to tell
When he looks at you, does he get an erection.
no, not at all, its perfectly normal
ya most boys dont hit puberty till their 12
He's a boy...
At about 5 months
You can't just ''tell''. you wait for your scan..
By getting naked
Usally you can go to the doctor and they can scan for you
You can see on the ultrasound sometimes
go to the doctor and get an ultrasound, then the doctor can tell you if its a boy or a girl
Of course, the meet attraction of a girl and contact is enough to enduce an erection
no