Golden Retriever boyfriend

Etymology
From, due to a person with this personality trait ostensibly resembling the personality of a Golden Retriever. Arose on social video-sharing service TikTok in 2021, and popularised in late 2023, but attested earlier (see quotations).

Noun

 * 1)  A man who is extroverted and excitable, kind, openly affectionate, confident, happy about life, and immensely caring toward his partner, but possibly naïve or unintelligent.