You do not want to have children of your own because...

i am sure i will fail as a parent
i have seen how bad failed marriage can impact a child so i will avoid having any
i doubt anyone will marry me
i doubt my marriage will last long enough to have any children
because i am happy being miserable and lonely and pathetic as that i am
because i eat non veg, drink alcohol and do drugs
because i hook a hooker and strip a stripper
because i am a bad person
because i do not have faith in myself
because i do not think one wife will satisfy my sexual lust and fetishes