Brain and libido

Articles on how brain chemistry, stress, sleep, and hormones (like testosterone and prolactin) influence male libido, arousal, and sexual performance. Learn practical strategies—from lifestyle habits to TRT and supplement considerations—to improve both mental sharpness and sex drive.

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The essentials for brain and libido — then explore the latest posts below.

How to make penis more sensitive: A urologist’s evidence-based plan to get sensation back

How to make penis more sensitive: A urologist’s evidence-based plan to get sensation back

Dr. Alexander Grant, MD, PhD avatar
Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate
Dec 26, 2025 · 12 min read

Penis sensitivity often returns when you stop desensitizing friction habits (high pressure, low lubrication) and address underlying medical causes—because sensation depends on skin receptors sending signals through the dorsal penile nerve and adequate blood flow to penile tissues. This step-by-step plan shows you how to reset “conditioning” and when numbness is a nerve, vascular, medication, ...

Does having sex increase testosterone? The truth about bedroom habits and hormone levels

Does having sex increase testosterone? The truth about bedroom habits and hormone levels

Dr. Alexander Grant, MD, PhD avatar
Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate
Dec 23, 2025 · 11 min read

Sex and ejaculation can cause a short-lived testosterone rise of about 2 ng/mL, but levels typically return to baseline within 10–20 minutes, so it doesn’t meaningfully increase long-term testosterone. The bigger picture is a bidirectional feedback loop—testosterone drives libido, while arousal triggers a brief neuroendocrine surge—and why overall health often explains the “high T” sex-life ...

Does testosterone affect how long you last? The science of stamina

Does testosterone affect how long you last? The science of stamina

Dr. Alexander Grant, MD, PhD avatar
Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate
Dec 19, 2025 · 11 min read

Testosterone mainly supports libido and erectile function, but it doesn’t directly increase Intravaginal Ejaculatory Latency Time (typically about 5–7 minutes) because ejaculation timing is largely a serotonin‑mediated neurological reflex. Low testosterone can still make you feel like you’re finishing “too fast” by destabilizing erections and creating a rush-to-finish pattern—here’s what actually controls stamina and when ...

Celebrity penises and the big penis myth: What men should know

Celebrity penises and the big penis myth: What men should know

Dr. Alexander Grant, MD, PhD avatar
Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate
Dec 15, 2025 · 10 min read

The average erect penis length is about 13 cm, and “celebrity” size claims are usually meaningless because flaccid photos, camera angles, and nonstandard methods (vs. bone-pressed erect length) can’t reliably indicate true erect size. Here’s how to measure accurately, stop misleading comparisons, and focus on what actually improves performance and confidence (like erection quality and ...

What happens if we release sperm daily? What science says about testosterone, muscle, and men’s health

What happens if we release sperm daily? What science says about testosterone, muscle, and men’s health

Dr. Alexander Grant, MD, PhD avatar
Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate
Dec 11, 2025 · 13 min read

Wondering what happens if we release sperm daily? For most healthy men, frequent ejaculation is safe and does not drain testosterone, kill muscle gains, or wreck long-term health — but there are a few important exceptions you should know about. “For the average healthy man, ejaculating every day is more of a lifestyle choice than ...

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