How do you put make-up on a boy?
you don't, it's just that simple. If you're trying to dress him as a girl, you just work on him like he's a girl. If he's got facial hair, you need to get rid of it first--shaving, waxing, whatever--but other than that, just pretend he's a girl. If this is for stagework or television, he needs foundation, a little bit of contour on his cheekbones, powder all over his face, and a lipstick maybe a shade darker than his natural lip color--Maybelline makes a Nude Blush shade that's great for this. If it's a big theatre, he'll need eyeliner too. Do a makeup test; make him up, put him on stage with the lights set as they'll be for the show, sit in the 10th row and look at him close. If he's got good facial features and you can see his eyes and mouth, you're fine; if his face looks like a beige blob and his eyes disappear, he needs more makeup. If he's just going out in public as a guy with makeup on...he better know how to fight, because someone will start one with him.
It is rude of the boy for making fun of your makeup, but a sign to you that you are probably using too much makeup and looking more clown-like than pretty so take it as a warning that you need to be taught how to use makeup. Ask your mother or a sister or possibly a friends who uses makeup in a more natural way to help you put makeup on or, ask your mother…
When you can wear makeup is for your parents to decide. Some will say earlier than others. You don't have to be a certain age to wear makeup. You could use makeup for anything - pageants, competition, or family events - as long as your parents allow it. You could even wear makeup to school, just don't put a lot of makeup on.