Definitely the most romantic track of the album expressing how much love he has for his counterpart. Wishing to grow old with her and after their deaf be prolong and the one spot where their love was expressed the most.

“The ultimate way of being corny and saying grow old with me…without being corny and being like cryptic and cool about it” As explained more in depth more with the making of video here:
https://www.youtube.com/watch?v=jSym0RlCVf0