I have a handful from previous relationships that I tend to keep to myself (in that I don't tell my husband) but our song is 'At Last' by Etta James, it was our wedding song.
Depends on the 'your' doesn't it? In the 1960's, when husband No.1 and I were courting (married 30 yrs., don't get the wrong idea) it was Sonny & Cher 'I got you, babe'. Current Mr. J2 - I don't really have one, we met when singing in a choir in France, so all that year's repertoire means something really. Recently we have worked very hard together on Elgar's 'Ave Verum' so I suppose that has a special place. :)
We don't have one. Oh dear. Married 48 years and no special song. Neither of us is particularly romantic. But I will choose Yellow River because it reminds us both of great friends and wild times in the early 70s.
My Dad died when I was in my early teens, and I find it difficult to remember him (house fire many many years ago means there's no photos), but I always remember him listing to Strangers in the Night by Billy Eckstine and Sarah Vaughan, which is an awesome song, so even now I'm 50 I'll occasionally listen to this just to evoke some memories.