Answer for What are Some Ways to Instantly Ruin the Mood During Sex?

Start laughing or tell a joke.
Being overly reliant on having porn in the background.
Called your partner the wrong name.
Barking dog or pet in the room.
There are many ways to “kill the mood” and the number one way I like to discourage is the failure to be in the moment.  Capable lovers are in the moment, responding to what is happening before them.  When you’re stuck in your own head thinking about your grocery list you’re not as responsive.