I don’t care what your gender is or your religion or your skin color or anything. Every part of you belongs to you.
Your hair belongs to you. Style it how you choose, professionally or a home cut, dye it or leave it plain - it’s yours. Nobody tells you what to do with it. You accept the consequences of it - but it belongs to you.
Your face belongs to you. Wear makeup, get a sunburnt nose, get plastic surgery, moisturize - it belongs to you.
Your body belongs to you. Nobody has any right to touch you against your will. If you have agreed to a tacit social contract between friends that handshakes and hugs are ok, that’s you saying that contact is ok - but if you ever say “I don’t want to be touched today” that is your right. If you don’t ever want physical contact with anyone ever again that’s your choice. If you want to spend every day hugging people - well, make sure they agree, and do it. It’s your choice.
If you as an adult want to have sex, go for it (with the other person’s consent). You accept the consequences of sex with regards to emotions and physical risks, but it’s your right to choose to be open to having sex. If conversely you do not want to have sex - that’s also your right, absolute and inviolable. If you want to be a monk for the rest of your life nobody can or should force you to change that.
Your knees and shins and toes belong to you. Your fingernails and bellybutton belong to you. Nobody has a right to touch them unless you say yes, and if you say no, they have to stop and respect that. Paint your nails, get a tattoo, get a piercing, be plain-skinned and unadorned. This is your decision and yours alone.
Now I know that this does not always happen in real life and we don’t want to make a fuss out of every unwelcome shoulder-slap and too-long handshake we encounter in this world. But this is the baseline you start from. This is the fundamental truth of your body that you must always begin from, every morning you wake up, every night you go to sleep:
Every part of you belongs to you.
(Remember, remember that the inverse is also true: every part of every other person on this planet belongs to them, and you have no right to touch so much as their hair without their consent.)