Shounen are action animes geared more towards a young male audience. Those tend to have more of what is called “fan service,” which is what you just described there. There are also slice of life, survival-horror, and romance animes, among other genres. I believe slice of life and romance are more geared towards females. Personally, I can’t stand romance or slice of life, so I usually watch the action stuff. If it’s got good visuals, a good plot, compelling characters, cool concepts and world-building, etc., I can ignore some fan-servicey moments. However, I don’t recall Death Note having any of that and it’s classified as a shounen despite not having much action.
Also, happy cake day!