Not a scientific answer, but because they are immature.
Answer:
leg tapping is one. And another is fitgiting with fingers and hands.
Answer:
Explanation:
According to my research on studies conducted by various medical professionals, I can say that based on the information provided within the question that the basal lamina is a specialized form of the extracellular matrix found beneath all epithelial tissues, which constitutes a large part of the basement membrane. The basal lamina can be found in many parts of the body including the skin, kidney, and even throughout the vascular system.
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Males get very aroused around their partner they find sexually attractive and the male sex hormone known as testoterone is going crazy. If you want a more specific answer I'd reccomend researching the male anatomy.
