Here is the full list of all 28 Genital Jousting achievements.
Finish last in a Party Mode game.
Start taking responsibility for you actions.
Swallow every worm.
Make peace with a gaggle of swans. Their natural instinct is to kill.
Use the cake knife to defend yourself from wedding guests.
Safely deploy all the fire extinguishers. For safety.
Move to the right.
Move to the left.
Learn how to literally just navigate the main menu.
Penetrate God.
Reminisce about your care-free days as a cactus picker.
Don't let sleeping dongs lie.
Use all the "supplements" you can for maximal gains.
Submit your monthly physical report.
Eat a disgusting amount of popcorn.
You should see a doctor immediately.
Die a lot of times in your nightmares.
Collect enough milk to fill the tank.
Have enough friends and enough controllers to play an 8 player game.
Good at video games. Terrible at sex.
Be the only one locked out of an ouroborus.
Marry yourself in Abstinence.
Get all of the rings in Lord of the Rings.
Win Lights Out in under five seconds.
Everyone survives having sex in a trash-compactor full of needles.
Have sex in the Date Night graveyard.
Penetrate yourself in Traditional Mode.
Save yourself for that special orgy.