Why dont white boys date black girls?

ok so i always see white girls JUMP into a relationship with a black guy but then when it comes to a black girl liking a white guy its like , you don't have a chance like , why is this? i mean im black and i find white guys really attractive but its like a 99.99% chance that you'll see a white guy holding hands with a black girl emphasizing that they go out . what is it like you feel intimidated or do you feel as though you cant handle a black girl? like i just wanna know to be honest so can you answer the question THANKS !! :)