I have always considered this one of Motown's all-time great classics. Since purchasing a new car recently, I hear it constantly on Sirius XM radio and each time I hear it I think I appreciate it even more.

So my question is: How did this incredible song ONLY go to number 13 on the charts? After all, the Temps were established by that time, Motown as a whole was exploding, the Supremes were at their peak, etc. So why was this not a mega hit? Thoughts?