I think most of us would prefer to make love (with retroactive effect) to those with whom we were madly in love during our teenage/young adult years, but who remained always unattainable, because those will always remain within the realm of dreams.
When you actually touch an angel, (s)he becomes human and is not so special anymore, but if you are lucky you may discover that (s)he is special in very many other ways. However, most of those youthful infatuations do not last that long, therefore it is better to keep them as gilded memories of yore