The Big Bang Theory: 14 Unforgettable Sheldon and Amy Moments

Remember when The Big Bang Theory‘s Sheldon adamantly referred to Amy as his friend but not his girlfriend?

Needless to say, the couple’s Relationship Agreement has undergone quite a few tweaks since their peculiar “meet-cute” in the Season 3 finale, with the biggest change coming in this Thursday’s episode (8/7c, CBS).

On the eve of their momentous giblet joining, TVLine looks back at 14 unforgettable “Shamy” moments, from first kiss to first spanking.

Browse Sheldon and Amy’s best, worst and most uncomfortable moments in the gallery below — or click here for direct access — then sound off in the comments.