Michael me cum at all if it was possible
Well, I think it's better if you do cum from time to time ... doesn't need to be very often though .. even more imporant is that you have a full erection every few weeks / every month at least- that really is important.
I have worn a chastity cage for five years now (ok, I had many breaks) but that didn't harm my testicles - still, I decided to go for a belt.
If you want to make children - maybe just have an ejaculation the day before you want to make them to make sure your semen is all fresh and young and by that of high quality.