Spread them Wide and Say Yeehaw!
Fit the cylinder in the hole.

Comic Dialogue
(If you have Wii Gloves for you wee little fingers it’s also electronic Braille.)

Hersute the Demon Champion of Demusa: “You’ve got two cocks… And I’ve got two holes…”
Hersute the Demon Champion of Demusa: “So match them up fuckers!”
Dragon Brute: “You… Want both of them?”
Other Dragon Brute: “At the same time?”