Answer:
First off make sure your girlfriend/wife is ok with you giving her oral. Just in case you try to surprise her with it and she doesnt want anyones mouth down there. But if your girlfriend/wife does want you to give it to her she will usually ask you herself or hint on it.Ladies do NOT be afraid to ask your boyfriend/husband to give you oral, because in most cases the man will be up for anything to pleasure you.But i do recommend trying fingering before oral to get the woman comfortable with having something down there moving around inside her.
Oral sex is not very complicated..its just basically stick'n lick.. Basic oral is just sticking your tongue inside of her and licking the clit and the inside of her to give her pleasure and eventully make her have an orgasm. When you first do oral with your woman,usually the first position to oral is basically: pants low enough so that you can pleasure her and slowly stick your tongue inside her and lick around without going too fast at first. Then as you progress you can try having your legs over your shoulders with her pants still on and low enough so you can peak your head through the gap.Next try doing oral without pants or underwear. Finally, last but not least is alot of womens and mens favorite position which we all know as "69".
"69" is basically what the numbers look like. The woman and man lick each other's genitals(vaginas/clit and penis) simultaneously.It does not matter who is on top and vice versa. When doing this position you can always steam it up on both sides..Men by using ur finger to enter as well as your tongue but not at the same time until she can handle it..while girls can use their hands to stroke the testicles lightly.. and their is many more but it is mostly what each of you like the most.Don't be afraid to experiment when having oral sex on either side, boy or girl, to see what he/she likes, and even though it may be something someone else doesn't like,it doesn't mean you don't like it too.
And finally my best tip to all guys is ,"DON'T RUSH YOUR WOMEN!" and girls don't be afraid to tell your men to stop for awhile or put ur hands on their head to show them that you like it. I wish all you couples good luck and have fun!