How to hit from the back

[foidabuzer764]

Ik its gna sound kinda weird but i was having sex with my girlfriend i tried hitting it from the back but i couldnt find it i was confused and i felt defeated any tips on how to navigate and find it from behind?

 

[deadmau154]

Hit on July 24, 2016

 

[foidabuzer764]

like what is that even meant to ref