To Jews (especially Orthodox) explain to me in real simple terms abou the not eating meat and cheese?

i could give you a logical, and not complicated explanation regarding the law of the Torah (three times repeated):

Exodus 23:19 The first of the firstfruits of thy land thou shalt bring into the house of the LORD thy God. Thou shalt not coock a kid in his mother's milk

ask again for this.

there is no law in the torah that forbid eating meat and cheese. this is from the Rabies of the talmud. there is no good reasoning for this. so, i am going to tell you a jewish joke that very ortodox jews may not like.

god said unto Moses: Thou shalt not coock a kid in his mother's milk

moses answered: i understand, we shall not coock meat and milk together. god repeated: Thou shalt not coock a kid in his mother's milk

yes, yes. said moses, we shall not eat meat and diary the same meal.

liten well, said god, Thou shalt not coock a kid in his mother's milk

sure said moses, we shall keep separate cutlery for meat and for diary.

i am tired of you, said god. do what you want.

Wikipedia ( under Kashrut )

Many of the basic laws of kashrut are derived from the Torah's Books of Leviticus and Deuteronomy, with their details set down in the oral law (the Mishnah and the Talmud) and codified by the Shulchan Aruch and later rabbinical authorities. The Torah does not explicitly state the reason for most kashrut laws, and many varied reasons have been offered for these laws, ranging from philosophical and ritualistic, to practical and hygienic.

This doesn't really answer your question, but it does show that it is a complex issue.

Here's an easy rundown of the rules concerning meat and dairy:

" Separation of Meat and Dairy

On three separate occasions, the Torah tells us not to "boil a kid in its mother's milk." (Ex. 23:19; Ex. 34:26; Deut. 14:21). The Oral Torah explains that this passage prohibits eating meat and dairy together. The rabbis extended this prohibition to include not eating milk and poultry together. In addition, the Talmud prohibits cooking meat and fish together or serving them on the same plates, because it is considered to be unhealthy. It is, however, permissible to eat fish and dairy together, and it is quite common (lox and cream cheese, for example). It is also permissible to eat dairy and eggs together.

This separation includes not only the foods themselves, but the utensils, pots and pans with which they are cooked, the plates and flatware from which they are eaten, the dishwashers or dishpans in which they are cleaned, and the towels on which they are dried. A kosher household will have at least two sets of pots, pans and dishes: one for meat and one for dairy. See Utensils below for more details.

One must wait a significant amount of time between eating meat and dairy. Opinions differ, and vary from three to six hours. This is because fatty residues and meat particles tend to cling to the mouth. From dairy to meat, however, one need only rinse one's mouth and eat a neutral solid like bread, unless the dairy product in question is also of a type that tends to stick in the mouth.

The Yiddish words fleishik (meat), milchik (dairy) and pareve (neutral) are commonly used to describe food or utensils that fall into one of those categories.

Note that even the smallest quantity of dairy (or meat) in something renders it entirely dairy (or meat) for purposes of kashrut. For example, most margarines are dairy for kosher purposes, because they contain a small quantity of whey or other dairy products to give it a buttery taste. Animal fat is considered meat for purposes of kashrut. You should read the ingredients very carefully, even if the product is kosher-certified." from http://www.jewfaq.org/kashrut.htm

Here's another excellent overview of all the kosher laws: http://www.ou.org/kosher/primer.html

Not Orthodox but was raised that way The law is we do not eat meat cooked in its mother's milk, A cheeseburger is almost for sure not cooked in its mother's milk, but we are not sure. Another reason when the laws of kashrut{kosher} were written it was highly possible that the milk was rancid

Exodus 23:19 The first of the firstfruits of thy land thou shalt bring into the house of the LORD thy God. Thou shalt not seethe a kid in his mother's milk

Exodus 34:26 The first of the firstfruits of thy land thou shalt bring unto the house of the LORD thy God. Thou shalt not seethe a kid in his mother's milk

Deuteronomy 14:21 Ye shall not eat of any thing that dieth of itself: thou shalt give it unto the stranger that is in thy gates, that he may eat it; or thou mayest sell it unto an alien: for thou art an holy people unto the LORD thy God. Thou shalt not seethe a kid in his mother's milk

can you be ABSOLUTELY POSITIVE that the milk used for that cheese was NOT from the mother of the meat that you are eating??? better to be on the safe side

as for the chicken, Israel was commanded to build a fence around the commandments, and if the Rabbis make the law.....God already knew they WOULD make the law, and, in Deuteornomy 17, said to follow it

12: And the man that will do presumptuously, and will not hearken unto the priest that standeth to minister there before the LORD thy God, or unto the judge, even that man shall die: and thou shalt put away the evil from Israel.

13: And all the people shall hear, and fear, and do no more presumptuously.

under pain of death..........they were given the highest of authority

SIMPLE? OK:

Don't mix meat and dairy (milk, butter, cheese, yoghurt) at the same meal, or on the same plate.

Eggs and fish can be eaten with either meat or milk.