Image imported from derpibooru 
Original Description:
 
It din’t take long or both pony mares where sinking into the tar like brick with just their heads above the surface. Applejack soon sunk even a bit deeper and her mouth alread covered with thick tar. Applejack wasn’t worried at all and felt very comfy in the goop.
 
Rarity on the other hoof rather starting to feel a bit too much comfy and even started heavy breathing and got a bit, aroused by feeling the stickyness all over her body.  
She din’t care if her wondefull mane got all messy. Rarity sure enjoying the sink.
 
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