You see, the bechorim all stay after shachris, and eat year old macarooms. But the einum bechorim run out the door. And then there is no time to eat, and there is nothing to eat anyway.
I was in shul last night and asked the gabbai if there was going to be a siyum. He says, “I have a siyum to make, but I don’t have good food.” So I said that all I need is a siyum, I don’t care about the kind of food he serves. This other guy who’s not a bechor overhears us and interjects, “yeah, but I don’t care about the siyum, I just want the food!” So apparently the non-bechorim do partake.