Because do you really need a reason to not write Apple/Dash clop? Sometimes, Rainbow Dash just happens to crave Applejack's rump and what lies between. Waking up early to tease her marefriend results in a chain reaction of cloppy misadventures.
Slip into a world where the air I breathe is mine, nothing to overwhelm me and nothing to cloud my mind, come with me into it and you know what you will find, time doesn't exist here~