I put my males in for 3 or 4 days then give them 3 or 4 days off. If I witness copulation I will shorten this time period. If they seem uninterested the next time I put them in I will give them a couple of weeks before introduction again. The time apart seems to get them interested again, maybe absence does make the heart grow fonder?and yes males do need some recovery time so dont overwork them.