Sex appeal is not always related to attractiveness.
Pop quiz, do you know the episode with the In-Universe explanations for similarity between alien species? (For answer click below).
Star Trek: TNG
What episode has the in-universe explanation for similarity between alien species?
What was the name of the race mentioned in this episode?
Star Trek: TOS
What ST:TOS race might the TNG race refer to? (TV not books)
What was the TOS episode featuring evidence of this race?
1.ǝsɐɥɔ ǝɥʇ :ǝposıdǝ
2. sɹoʇıuǝƃoɹd ǝɥʇ
3. sɹǝʌɹǝsǝɹd ǝɥʇ
4. ǝɯoɹpuʎs ǝsıpɐɹɐd ǝɥʇ