When the gender is excited, blood gushs to sexual organs in great quantities, the hemal and oozy plasma that resembles passing vaginal wall is same, produce mucus secretion.

 
  • 在性兴奋时,血液大量涌向性器官,就像通过阴道壁的血管渗出血浆一样,产生黏液分泌物。
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