What+physical+changes+occur+in+males

** physical changes  ** You'll get taller and stronger and start to develop greater muscle mass.    Your testicles and penis size increase. It's common and normal for one testicle to be bigger than the other. Some young men worry about their penis size, however sexual functioning, including the ability to make love and to father children, does not depend on penis size. If you're worried, have a chat to a doctor or health professional.  Some boys' breasts may grow slightly or feel tender. This is normal and is a reaction to hormones in the body. This will go away. (See the topic **'Gynecomastia (Male breasts)' ** ) Body hair begins to grow around the pubic area, on legs, under arms and on the face. The hair starts off fine and becomes coarser and darker over the years of puberty. Some men continue to grow a bit and develop more body hair right up into their twenties. In puberty the voice becomes deeper, sometimes called "voice breaking" because of the ups and downs in tones.  Did you know that older men who smoke may have trouble keeping an erection? This is because the blood vessels in the penis are damaged. For more information see our topic **Cigarettes and smoking**. In puberty the voice becomes deeper, sometimes called "voice breaking" because of the ups and downs in tones.  