Stuart Matthew is 19-year-old singer from India, his voice have been considered really sensual. Stuart mostly sings on the female key (which is pretty high) instead of male key cause his voice is really high-toned and soft.
His voice already speaks how sultry/seductive it is no validation needed.
Stuart Matthew singing 'West coast' by Lana Del Rey
Check out the cover of Uh Huh on YouTube
He also did a song called Selfish which is super sensual and full of cold chills, you don't wanna miss it!