of course it is. from about 12 to like 16 you get erections all the time for no apparant reason. just trust me. Even girls have something like that. I could get all excited physically at that age while being mentally focused on science books. Or all aroused out of frustration about unfinished homework. The brain`s location for frustration and pleasure seem to be close together.
Let's cut off the unnecessary part of the question :-)
"Is it normal for a twelve year old boy to get an erection when..."
It is normal for boys in that age group to get erections at all sorts of times... it's the hormones of puberty running through their bodies and not anything to be concerned about.
Maybe not all, but many of then would be able to.
Yes, it is completely normal.
yeah, its normal. it just means that your penis stretches a lot when you have an erection
It is not normal.
Totally normal, I pee with a boner all the time.
yea completely normal
yes totally
Sterility means the person can not have childrenImpotency means the person is unable to have a satisfactory intercourse.Sterile person can have a normal erection and normal intercourse
Yes it is very normal :) it could point to you being gay or bi or something like that but not necessarily especially at that age but no matter what sexual orientation you are it's pretty normal ^_^
yes its normal
yes the penis should point either forward or up. It depends on how strong the erection is. The more excited and stimulated you are the harder it will get. Not all erections point upwards so it is normal for you.
Yes
Nope, Your screwed.. (: Have fun without an erection.. :P