Arithmetic Progression

I have three friends. Out of whom,
one loves deserts, two are writers,
and three are imaginary.

Edit: Every now and then I feel the need to clarify that everything that's written in first person need not necessarily be referring to me. First-person just happens to be the way of writing I like most. Personally, these days, I have four, not three friends. And they're all overworked analysts.