Why does a penis go erect when we go to sleep.It will also be erect when we wake up in the mornings.?

Dont worry its normal, i heard on tv a doctor talking and he said men get up to 5 erections a night, and they are soposed to, if they dont somethings wrong, yoru ok

For young guys it's called nightly wet-dream and just is normal.

In fact, during puberty and adolescence it is due to the hormones storm while later it just is the vivid fantasy and the hot dreams to let that event. Anyway it happens to many men too and and precisely at the end of the sleep and precisely in the REM phase of the sleep (without memories).

On that time dreams are more deep and unconscious, many erection occurs repetitively (and during one of them for young guys there could be a little ejaculation too).

When awake guys remember nothing about.

Growing on and with a regular sexual life such occurrence decrease a bit.

There’s no problem of course.

It's normal. I usually get an erection when I began to feel sleepy and usually it last untill the next morning. It is said that this is a sign of one's sexual health (at least people here says so).

Yes

it means ur penis is fully functional all geared up and ready to go !!!

yes its normal

there isn't anything wrong your body is just keeping up maintance