Some mind-boggling number of facebook user from Pixable.
Facebook user are known as heavy uploaders. However, this is especially true to women who have surpass men in uploading the most pictures to their accounts. Cam whoring and making-funny-faces are a women virtue after all.
Apart from that, guys prefer taking picture with girls but girls prefer taking picture with girls according to a study from a Harvard Professor Mikolaj Jan Piskorski. How true it is may depends on the type of friends you have but for me it’s totally solid.