How do you private message in twitter

A question about : How do you private message in twitter

...if the other person is not following you?

won a comp and was asked to private message them, but can't do it as they arent following me

Pretty new at twitter lol

Best answers:

• you can't
  ask them to follow as you won & MT their winning message
• tweet them and ask them to follow you. you have to be following each other tobe able to send a message
• ahh thanks guys, have done so
  I find twitter quite confusing, but only joined a couple of weeks ago - for comping
  thanks again