I don't know how to talk to girls on online dating sites what am I supposed to say for a first message or what do you guys say? i'm not totally idiotic but i'm not sure what the protocol is. is it just a simple "hello!"
A simple "hello" or "Hi" will get you deleted. Even worst is "How are you doing?"
Think of how many messages these women are getting per day and plan your attack from there. You want to stand out but also not be a cock.
Too many guys talk about sex in the first message so they'll get deleted. Others will post a blatant copy and paste message they'll be deleted too.
As others have said read her profile thoroughly. I'm not sure which dating site you're using but a place like Ok Cupid lets you see stuff on a women's profiles like 'the two of us' which will let you find out a bit more about a person and if they have the same opinions as you.
Using that and also dropping in a few words about her fave band or films usually works a treat. I've found asking them to look at your profile always works. Also make sure you have about 5 pictures. When I was on the dating sites I usually had 5-6 good face pictures but make sure none of them are of you topless in the bathroom mirror with a phone in your hand. For any woman worth her salt that immediately = dickhead
1 more tip. If the dating site you're using has instant messenger never use it for introductions. Nothing will have you blanked faster than trying to chat to her out of the blue. Mail her first then if she responds suggest the instant messenger.
Good luck.