Can I let him cum inside me if I have an iud?

Marisol
Hey guys! So I'm 23 and this is my first time successfully on birth control. Always in the past since I've ALWAYS rigorously used condoms. Now that I'm on the paraguard IUD -- got it inserted in November and just last week I had a string check and the doctor said everything looks great. So my main question can I let my boyfriend cum inside of me? I only have one partner so I know about stds, etc. but is it ok? I won't get pregnant? I've never been ejactulated inside so it seems scary. Like where does the cum go? Does it feel good? Haha 🙈 sorry I'm such a noob but I'm so curious. I've also heard that bv is common when you let your guy cum inside of with an iud? Is that true? Thanks for any help guys 💜