Best when about to climax thrust ALL the way in balls deep with your partner wrapping his legs, arms around you ( if in missionary position) to inject and deposit your boiling hot semen as deep as possible into the bottoms rectum.
Totally agree! Copulation or intercourse isnt or shouldnt be just about penetration its also about insemination. When topping another male one should never pull out and anal copulation should always be bare in the ass with deep seeding.