i do not do a thing and they mate! one i time i had a male that wasn't ready to mate and then i cooled him for a few weeks and bam warmed him back up and put him in with the females and he was ALL over them.
I rarely have trouble with my males . this method is more for getting females in the mood and ovulating. I have had more then a few females who were tense and agitated just not ready for mating be completely submissive and quite ready for the male a week or two after introducing an object with males sent on it.