Sounds like some post-nut clarity.
"Post-nut clarity" is a colloquial term referring to the feeling of increased mental clarity and focus that some men experience after orgasm. It's a subjective experience, and not everyone experiences it, nor is it consistently experienced by those who do. Some attribute it to the return of blood flow to the prefrontal cortex after orgasm, which is responsible for cognitive functions like decision-making. Others point to hormonal changes, like the rise in prolactin after ejaculation, which can promote a sense of calm and relaxation.