Is it ok for sperm NOT to leak out of me during/after sex?

We got pregnant through

<a href="https://glowing.com/glow-fertility-program">IUI</a> the first time we tried. His numbers were fine/normal when tested in lab... but why during sex does it never feel abundant? It never leaks out of me after ... never messy, etc. He doesn’t have high sex drive- could this be why? Anyone with similar experiences or info on this? Help! I’m already nervous for eventually trying for baby #2. I’m soo grateful for our baby now (7 months old) but I can’t help but be a little worried since ttc the first time was such a stressful experience. Thank you in advance💗🙏🏼💗