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How Do We Science?

Both a love letter and a starter guide to the bare basics of how science works.

What's the Typical Use Effectiveness Rate of Abstinence?

Heather Corinna
asks:
What's the typical use effectiveness rate for abstinence? All I can find anywhere, even at organizations that teach abstinence, or say it's the only effective method of contraception, is the perfect use rate. How well does it really work for people in real life? Why doesn't anyone have that information on this method when we do for every other method?...

I'm 20 - will my penis grow more?

confused
asks:
I am a big guy ( about 6'8" ) and am almost 20 yet I have a small penis for my size ( 5 inch ). How come? Is there any hope it will grow more ? ...