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