I've noticed this behaviour from our females on numerous occasions. Especially from our big red female! I've noticed that depending on the intensity of the "twitch", as well as the loudness of her response, the male usually either avoids her or they mate. Mating usually occurs when the response is softer and more mellow, almost like a "hey big boy" kinda response to his test licks.

I find it kinda cool how you can tell who is busy talkin because they all sound unique in their calls. Going on 5 years of talkin and everyone still has their tails! :thumbsup: