ETA: Are there really schools who say anytime someone asks you for a toy you MUST share it?
Not schools, but a certain Grandma's house and perceptions of certain cousins. Rules had to be adjusted due to one cousin being a particularly special snowflake at times.
1 - You do not have to share with anyone who does not share with you. If someone won't allow you to have a turn with their 'really neat' toy, you aren't obligated to hand your 'really neat' toy over no matter how much they demand it is 'their turn'.
2 - When selecting legos or similar toys, you do not have to agree to any trade you do not want.
3 - If a trade is agreed, you have two minutes in which to change your mind. This serves to prevent peer pressure and cases in which the 'trade' was made without full consent or knowledge. Attempts to cheat someone in a trade will result in paying a forfeit.
4 - Trades of personal items are not permanent unless agreed to by the responsible adults
5 - If you aren't willing to share the item, leave it home or put away when entertaining guests
6 - Mommy does not have to share her computer or assorted peripherals no matter how cool you or any of your guests think they are, and refusing to abide by this particular rule will result in guests going home immediately
7 - If Daddy is home sick, he does not have to share the big TV
8 - If you ate immediately before you came over and someone else is just starting their meal, they are not obligated to share their food with you
9 - Failure to come to agreement regarding turns and choice of game on the computer or console or having any disagreement regarding the computer or console result in yelling will end with the computer or console being turned off immediately and nobody getting to play.
10 - If the rule is at home that 'host' gets to choose the game, then the rule when visiting isn't that visitors get to choose the game.