Lithuania/America: During his outsourcing, Lithuania hits his head and reverts to his knight self (as seen here: http://community.livejournal.com/hetalia/15100.html). America finds badass!knight!Lithuania hot and Lithuania decides the feeling is mutual and sexytimes ensue.

Bonus: might be getting a bit complicated, but maybe America taking a knock on the head too and reverting to his cowboy days? XD