Found this somewhere...

Sex between a true top and a true bottom is a sacral act. 
A TOPS sexuality is masculine, expanding, entering, exploring, conquering, penetrating. 
A bottoms sexuality is accommodating, drawing in, opening, submitting, beckoning, willing sacrifices his manliness to the top. By spreading his legs and allowing his top to penetrate him and conquer internally. The bottom having given himself entirely to his top, he then receives from his top, the tops manliness. Which moves inside him ultimately releasing inside his bottom. 
Anal sex is key, because it is the most intimate act two men can share as well as the most fitting way for a bottom to submit to his top. For the top to dominate and fulfill his bottom. 
as a true top man his sexual organ is his penis, for the bottom his primary organ is his anus/ rectum. 
a bottom should revere and submit to his top man and constantly try to please his top.