Best Friends: a Concept, an Illusion or a Settlement?

me: do u have a best friend?

A: hmm i think so

me: who's your best friend?

A: i think its B. who is your best friend?

me: i dont know. i dont think i have 1.

is it weird that i do not have a best friend? what do we mean when we talk about best friends? are we referring to someone we can totally be ourselves with? 

'TOTALLY BE OURSELVES WITH??'

seriously? does that even work?. i mean totally means we share everything with the person we call as our best friends right?

consider this conversation:

me: what do you think of homosexuality T?

T: homo's are crazy arun. they like to put their kkj into the place where poop comes out. two sticks..how to have fun like this...u know we have one nose and fingers to poke poke...how to poke finger with finger...crazy huh..where got fun like this..?

me: ...dead silence..

ok ok thats probably not from a best friend. i assume if we have best friend he would probably know our sexual inclination..

now talking about sexual inclination. i have a colleague who once openly discussed the following:

my colleague: ive always wanted to be an interior decorator. but my parents were not convinced that it would make money. they encouraged me to do engineering instead.

>>that conversation went a little more and he described in detail about skin bleaching products, procedure and the difference between bleaching and whitening. he has huge interests in branded clothes, the only one in our group that knows the difference between 'au de toilette' and 'au de parfum', a gym member for 3 years straight but nothing much happening to his appearance, knows all the stuff about branded shoes and on the contrary makes gay jokes all the time or simulates the action of masturbation and worse accuses everyone to be homosexuals..

to top that up, he likes the jazz music and soak in his own filth smoking cigarette when we were in kuching for rainforest music festival, pretty darn keen to swim (in his trunk of course>god forbid i escaped that), wearing the bath robe in the hotel room and the WORST, 

hes married!

im not his best friend, but if i am even his friend, dont you think i should ask him to wake up from his dream and realize that he has just ruined a woman's life?

so best friends is it a concept, illusion or a settlement?