How do you make a girl orgasm?

Most women or girls orgasim quickly if you know what to do. Since this site has children who visit, it wouldn't be proper for me to spell it out for you, but you can always buy a book on that subject. Some females love it when you rub them the right way also.

Answer

Giving orgasms can be achieved in various ways, in most cases Foreplay is a must, gentle fingers and a educated tongue, massages, endearing words and/or dirty talk, for some porn movies, slow circular thrust with the penis, you must remember all women are different and want the things that please them, learn and know what they are, then use some or all of these to heighten her Libido to give the "Orgasm" she desires.
For most women two areas easily produce the best orgasms, first and the easiest is the "Clitoral stimulation" (care must be taken not to overwork this organ, it can become sore and tender). Second, the "Vagina and famed G-spot", women can have single or multiple orgasms.

By extensive sexual stimulation. When you are trying to pleasure her, ask what she likes best. It may be embarrassing, but it helps bond you and her while making things easier. Every girl is different too, so some things work while others wont.
Lick the clitoris. . a few times up and down. you will notice the legs shaking. orgasm is forming. then finger her.
To the best of my experience you need not to finger her just keep sucking like a nipple (Clitoris) she will have orgasm in 2 to three minutes.
Most guys reach orgasm long before their partners, then go limp, pull out, and fall asleep. This leaves women very frustrated. Only men have to reach orgasm to make a baby. If you think about early humans, you'll understand why: if you spend too much time rolling around on the ground, a tiger could eat you!
Most women have masturbated to orgasm at some point in their lives. If they are willing to tell you what to do, you should be able to help them reach orgasm with your finger or a dildo. Some women can reach orgasm through oral intercourse. Of course, the best thing to do is to learn how to hold off your own orgasm until the woman has hers!
If the woman doesn't know what to do, or doesn't want to talk about it, start with a gentle massage of the vagina, then insert your finger (be sure your fingernails are trimmed!) slowly and explore. Encourage her to tell you what feels good!