Fuck a Friend eve
Fuck-a-Friend Eve is the day before National Fuck a Friend day, widely considered to be April the 9th. On this day, two best friends can prepare themselves for the day to come, possibly by engaging in sexual activities.
"Hey, it's Fuck a Friend Day tomorrow, so that means it's Fuck a Friend Eve today, do you wanna get warmed up?"
"Sure!"
"Sure!"