There is nothing better than allow your excited man cum inside your pussy when he wishes. This is the best for several reasons: he doesn't need take his cock out from the pussy in his most pleasurable moment; some women (me included) reach a new orgasm in the right moment men are cumming. It could be due for several motives. Other times the simple fact to allow your man cum inside you, brigs women the needed extra seconds to reach their orgasm if they are close to cum. Some men with whom I have fucked, took their penis out from me in the right moment that they were going to cum (of course they were not using condoms). Despite I was turned on it stopped my orgasm!
I'm happy when I feel my husband or our black friend cumming inside me, because I know it brings them a great relief's sensation and good relax. I can feel the muscles from their bodies relaxing after that.