Brief Answer:
Can't be especially related to ejaculation.

Detailed Answer:
Hello dear, welcome to Ask a doctor's service.
I read your query and here is my advice.

I think that the noices after ejaculation are not related especially to ejaculation.
They can be related to having empty stomach and staying in silence after ejaculation which can make noises more prominent.
Also having foods which can increase gas in intestines such beans, broccoli, cauliflower, cabbage, peas etc may increase stomach sounds.
Artificial sweeteners such sorbitol can cause intestinal sounds.
Avoiding certain foods may help you have less sounds.
Hope I have answered the question.
Let me know if I can assist you further.

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