Annoyance

Someone i talk to has this habit of opposing to things i complain about and its semi annoying but idk how to address it. the other day at lunch i was complaining abt my chest and saying how i wish it was smaller for multiple reasons and they went "i wish i had that problem" and my only thing is you would wish you had the problem until you actually have it and then u r complaining about it just like i am. how am i supposed to explain this to them??