While receiving oral sex, right before you climax, tell your partner to stop. When she asks why, you give it to her in the face. You then snap your fingers and point down at her and yell "psyche!"
Jen: "I thought you refused to take it in the face?"
Mary: "John psyched me out just now."
While your parnter is sleeping, jizz in her eyes, so when she wakes up, she cannot see.
Mary: "Why do you keep bumping into things Jen?"
Jen: "Because John gave me the optometrist surprise last night."