Sometimes the hormones of puberty can cause changes in your mood, making you feel more upset or excited about things than you used to. Puberty not only prepares you physically for adulthood but mentally, too. For guys other more noticeable changes will emerge during puberty. For starters, you woke up one morning and had something wild going on in your underwear. You had what is called a nocturnal emission, also called a wet dream.
Most boys occasionally have a wet dream.
It's normal and you'll have them less and less as you get older. Guys will also notice the enlargement and low position of the testes and changes in the scrotum. Pubic hair emerges and the penis begins to enlarge in size shortly later. After peak body growth, facial and body hair emerges. Expect some odd squeaks in your voice as it begins to change and deepen at the peak of your growth spurt.