In order to pee the bladder (where urine is collected) needs to contract at the same time that the urinary sphincter (where urine comes out) needs to relax. Your sphincter … read more
Ask Us questions
Each week we choose one new Ask Us question and post the answer. Feel free to search or browse our past questions and answers to see if yours is already there.
To ask a new question, use our form. Ask your own question!
Can I get a girl pregnant from anal sex?
Even though there isn’t a direct path from the anus to the vagina, there’s a small chance that a female could become pregnant through anal sex. This is because semen … read more
I’m very thin, what can I do to gain weight?
If you’re growing or are very active in sports, it may be hard for you to keep up with the energy needs of your body and to keep on weight. … read more
How can I know whether my heart is working properly?
The heart muscle pumps blood to all of the organs in the body so that every cell gets enough oxygen. If your heart isn’t working right, you may have one … read more
Is shaving my body OK? I keep getting razor burn in my crotch from it…
Removing your pubic hair is a personal preference. Some guys trim, some wax, some shave, and some just leave it alone. There’s no medical reason to remove your hair, but … read more
What are endocrine glands?
There are many glands in the body that make up the “endocrine system”. These glands are the pituitary, hypothalamus, thymus adrenals, thyroid, parathyroids, pineal body, ovaries (in women) and testes. … read more
I popped a bump on my forehead with a needle and sticky liquid came out. What’s wrong?
I woke up this morning with a bump on my forehead; I thought that I must have hit it by accident, but the bump grew bigger and redder. I thought … read more
My nipples are enlarged and I’m not happy about it. What’s going on?
It’s possible that you may have a condition called adolescent gynecomastia. What happens with adolescent gynecomastia is that the tissue underneath a guys’ nipples starts to grow, and it may … read more
Is it normal to have a curved penis?
Just as the color, shape, and size of guys’ penises are different, the way they bend can be different too. It’s completely normal (and common) to have a penis that … read more
My earring is making my ear hurt, is it infected?
If your earring is causing you pain, it’s possible that you may have an infection. Signs of an infection include one or more of the following: redness, swelling, discharge, a … read more