According to many studies, male voice is considered more attractive and masculine when it's low pitched, in fact a low-pitched voice is a male sexual dimorphism and is connected with high-testosterone levels.
In the same way, female voices are considered more attractive when they are high-pitched, sign of high estrogen levels. According to a 2006 study, people with an attractive voice are likely to be judged more physically attractive.
Interestingly, when rated separately, the attractiveness of voice and face are not correlated, so someone with a beautiful voice can easily have a shitty face and vice-versa.
Men who have high-pitched voice are likely to be perceived feminine and betas, thus a bad voice may be a determinant factor in inceldom. A high-pitched voice is not the only cause of voice-related inceldom: men who stutter are very likely to be rejected by women, who percieve stuttering as a disability.
Connection between aesthetics and voice
A protuded maxilla is the key to have an attractive face in both genders, moreover a protuded maxilla also has an impact on voice, in fact people with projected maxillas have a bigger vocal chamber which provides them a more attractive voice