How do you know if a guy's got an erection?

The sight or sound of a pretty girl can make an erection happen in a guy. But if he is trying to hide it, there is no way that you will know. The last thing he wants is for the people in his class to see him with one.
The only real way you could know is if you tried to touch him there.

1. Guys get erections because they get sexually aroused but a lot of the time a guys body can get sexually aroused without the guy really being aroused. Eg a guy can get an erection just from a girl holding their hand on sitting on their lap or even smiling.

2. The second way guys can get erections is because the body has to circulate more blood around the penis every so often for cell regeneration etc. Sometimes people call them "random boners". You get a lot of these during puberty especially when you've just "dropped your balls" (Penis triples or more in size in what seems like a day but is probably a year or so).

There are several ways guys can hide erection. This video shows various ways that are all the tried and tested ways with a funny slant.


Guys get them all the time because they're not always because they're horny. And absolutely any sexual thoughts (which we have lots of) can set it off.

You'll know if someone has an erection because you'll feel a big hard lump of flesh in an area where you were sure there were no limbs.

How old are you may I ask?

Guys have erections when they have sexual excitement. The dimension of the penis increases and. A guy can hide it only wearing large, I think :)

I've felt them through their pants and sometimes if you are swimming with the guy and he rubs against you can feel it too. Some guys seen to be horny all of the time and some of the guys get horny over anything lol.

Guys get erections for all kinds of reasons and they can hide them if they know how. Most do. They don't like walking around with there pants poking out, especially in public.

Look by his pants, by his penis. If something is sticking out, he's got an erection. Unless his pants are 3XL lol I don't think he can hide it. It depends on how often they get them. When a man gets happy, that is what causes an erection