If you're going to kiss or have sex, it's good to look clean and smell nice. How do you do that? Brush your teeth, shower regularly and make sure you put on clean clothes. When you hit puberty, your body goes through changes. So it usually needs more looking after.
Everyone has a natural body scent. Smell is important in love and sex. You often find someone extra attractive because you like the way he or she smells. You don't have to conceal the smell of your own body. Your partner may actually like it.
During puberty people sweat more, especially under their arms, and this may smell. It’s completely normal. Washing every day and changing your clothes regularly is a good idea. Using a deodorant also helps.
Hormones make the skin become oilier. That leads to spots. Do you suffer from this? Use a cleansing gel to make your skin less oily. Don’t use ordinary soap: it often dries your skin out too much. Your skin then reacts by producing even more oil, resulting in yet more spots.