The Beach Boys' classic ode to young love and Baroque pop. I dare anyone to challenge that this song is one of the most important songs of the 20th century. It remains the "favorite song of all time" by Paul McCartney and this track, along with the album"Pet Sounds" as a whole, was even said to inspire The Beatles to write their opus, "Sgt. Peppers' Lonely Hearts Club Band." But really, just enjoy the track and allow nostalgia to consume you.
And more importantly, it is stuck in my head and I am completely fine with this.