I've been with my new bf a couple of months now and I've noticed that he doesn't really produce much cum, or at least as not as much as my ex partners. When we've used condoms it has looked like a reasonable amount but when he cums inside me I don't feel it come out like I have with other partners and also when he has cum in my mouth it hasn't seemed like a lot. What could the reason for this be? I am kind of worried that it may be a fertility problem because, if things go well, i would like to TTC eventually.