By definition, the mitzvah of love your fellow Jew as yourself is a command, not a concept, and Rav Shimshon Pincus z”l, quoting the Ramban, asks how such a thing is possible, since as yourself is an extremely difficult level to achieve.
And to illustrate the point he lets us hear as follows:
I know many righteous people who do a lot of chesed. But I have not yet seen a ba’al chesed who is willing to buy the same hat or tie for a needy person that he would buy for himself. A person’s affection for himself is something truly exceptional because a person’s own life is exceedingly precious to him.
It is indeed.
In EmunahSpeak: Love Your Fellow as Yourself, we quoted the Lubavitcher Rebbe zy”a on this very point. The Rebbe said:
“the mitzvah of love your fellow Jew applies (even) to a Jew across the world whom you have never seen.” And he didn’t mean that we should feel obligated to send him a check if we should find out that he needed help because the Rebbe’s understanding of love your fellow as yourself wasn’t mortgaged to the touchy feely chesed interpretation that we spoke about above (in EmunahSpeak: Love Your Fellow as Yourself).
However much the Rebbe, was wont to darshen in many other areas of Torah, vis á vis the mitzvah of love your fellow as yourself, his approach was literally straight down Main Street.
“What kind of love,” He asked? “Torah contains no idle words. When it says ‘love your fellow as yourself,’ love means love. Your fellow means not you, but him. As yourself? Just as much as you love yourself.”
And that has to also include what you love because it emotionally becomes part of you.
Rav Pincus z”l tells us that there is no joy like Torah learning. There is no pleasure like the pleasure of Torah wisdom. There is no delight like deveikus with Hashem.
And if there is no love like the love of your fellow Jew, which is nothing less than the love you have for yourself, then what better way could there be to manifest that love than by upgrading your fellow Jew’s taste buds with the aforementioned joy, pleasure, and delight so that he can reach the level of your sweet tooth for the same?