Ah, porn. We watch it when we're horny, when we're happy, when we're sad, and when we're doing homework or cooking dinner (YOLO?). So it's only safe to assume that we try to take the moves we see on our laptop screens and translate it into our own sex life.
We see the big boobed and long schlonged porn stars getting it on, and we think — Hey! I can definitely do that. So you try it with your SO later that night, and guess what? Turns out — NOPE, YOU ABSOLUTELY CANNOT DO THAT. Leave that sh*t to the acrobatic and flexible professionals.
So just remember to apologize to your girlfriend profusely for dropping her on her head when y'all attempted to 69 standing up. Or maybe call it quits when you try to straddle your dude's dick while hanging from a shoddy overhead lamp because you're just one swing away from the most awkward emergency room visit ever. #ouch