I have never understood this form of scoring. What is the origin of this score "title".
There seems to be some debate on where the term started.
One common explanation is that it was adapted from the French word l'oeuf (pronounced "luff"), which means egg or zero. In American sports, we often use a similar term of goose egg to refer to a score of zero.
The Oxford Dictionary also believes that the term "Love" could have been adapted from the phrase "to play for love [of the game]". Meaning that, if you have no score then you must be playing for the love of the game because you are obviously not very good.