cuz you are a real gentleman and can kill all you enemy like a real man. and they rage at you cuz they can't kill you and you take it as a man!

you can alos buy other boots and the item for the game you are in like armor for ad team and magic resistance or ap.

a real tank need lots off cc to keep the enemy busy while your adc and apc kills em. You can have 2 or 3 tanks on one team just you have apc & adc with awesome dmg.

play mostly defensive to you adc point you to go if you are top go when he is in a weak spot & when you jungler comes. Always have a ward & a lot of em if you are bot. and jungler tank is not soo good only mokai, cuz he have lots off cc

you have lot of dmg and can tank the whole enemy team. You can also do dmg cuz you are useless if you don't, buy ga againt karthus,trynda,anivia,zac,kog,cho... mostly take if you think you need it
take

If you die to fast by the enemy you can ask on from you team to buy a Runic Bulwark for op team fight

You can take what counter in your lane so the don't kill you so easy and you can kill em easy. like ignite for volibear,singed... all them with some awesome heal reg. grab flash almost every match, take teleport againt nidalee

you wan't deal so much dmg as tank but you can deal some good dmg to so you will be needing you cc to take the enemy out. but be awake of a blade of the ruin king it can east burst you down. always have you teammates to take the enemy down. try not to be find in a weak spot cuz late game you team will be needing you alot!

garen has no real cc like a stun or anything so he can't protect you adc and apc as much he can just spin to win in a team fight and q r on there adc or apc. but he can take all the enemy cc cuz his so tank and has dmg but just what i think ...

Always look for your mistakes and don't blame others. As long they keep fighting for the team. And i have some mistakes but Hope you find this usefull