I'm trying to mate my 5yo male with my 2.5yo female. The male and female are both willing, the female is revealing her tail and the male is mounting her. This is day 9 or 10. The problem is the male is not penetrating her and there is no tie. He is very, very close but it always seems that he's always thrusting in an arc that ends just outside her vulva. I can see his penis and I have seen him ejaculate a couple of seconds after dismounting so there doesn't seem to be any physical problem. I have kept the female very still and I've tried putting them at different vertical heights, to no avail. The male takes any physical intervention towards him (tried giving him a push forward) as a signal to stop what he's doing. If anyone has any suggestions I'm all ears!