Yes, bottom growth, referring to the changes experienced by transgender men or non-binary individuals on testosterone, can become more noticeable when aroused.
Here's a more detailed explanation:
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Bottom growth and erectile tissue: Testosterone can cause the clitoris to enlarge, often referred to as bottom growth. This growth involves the expansion of erectile tissue, similar to what was present before starting testosterone.
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Arousal and erections: When aroused, this erectile tissue expands further, leading to a more prominent erection. The bottom growth makes these erections more obvious.
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In essence: The tissue involved is the same erectile tissue that responds to sexual arousal, just in a more developed form due to the influence of testosterone.
Therefore, bottom growth doesn't inherently "get hard" in the same way a penis does, but the existing erectile tissue will engorge with blood upon arousal, making the growth more prominent and noticeable.