This page is only here to provide a bit of information about something that lots of people will be surprised to discover even exists and the normal reaction is OMG!
We're talking penis plugs.

The normal starting point is as a novelty, giving the appearance of a 'Prince Albert' piercing.

If you are tentative, but tempted then read more here.

Here's a penis plug FAQ:

Why? Well it's just something to try. Unlike real piercing which is definitely something not to try. If you're thinking yuck, then just walk away, but you might be missing something.
If you are thinking strange, but I might be missing something, the look here.

Ouch! that must hurt. Actually no. It's not painful or even uncomfortable, provided you choose one that fits in.

What does it feel like? Well it's not directly stimulating, but it is a pleasant and different sensation. It's definitely erotic.

What size will fit? It's impossible to guess. Start with 6mm (1/4"). This will be big enough for most. If it feels lose then try 8mm (5/16"). 10mm (3/8") is too big for almost everybody and anyway a comfortable size is best.
As for length, that's down to how adventurous you are. Try 2" for a starter.
Won't it fall back out? Yes. That is unless there's something to stop it, but that does spoil the illusion of it being a piercing. So if you want that, smaller sizes seem to stay in longer and using a minimal amount of a thick lubricant (eg. KY Jelly) helps.
Otherwise there are plenty of designs that include gland rings, to hold it in place.

Will it do any harm? If it's anything less than perfectly clean, it would be a good way to get an infection. If it's too big, it can do damage. Apart from that, just like sticking anything into a body orifice, be careful.

Can I train myself to use a larger one? Well I wouldn't advise it. Some people do, but my understanding is that this tube (urethra) doesn't stretch. When forced to be bigger it rips and then heals back larger. I can't see this being a good thing.
About half an inch in is the narrowest port and where damage can be done. See diagram. You can also see from this why they tend to fall out.

What happens if I come or pee? With most plugs it will leak out, unless the plug is a perfect fit for you and that will take a lot of trial and error. Some do have through holes. Solid plugs have been known to fly some distance.

How long can I keep it in? It depends on the plug, but more than a few hours is probably a bad idea, with any design. Plus they don't really feel comfortable when moving around, because a penis will bend and the plug won't.
If the lubricant dries out, they will become uncomfortable.

Where do you buy one? Quite a few places sell poorly made plugs. I wouldn't recommend using anything that didn't have a mirror finish and was made from the very finest materials. If you want an individual work of art look here

Are there any household items that I could try and save money? No! Don't do it. It's very easy to do painful damage and give A&E a good laugh.

How gay is that? Well fairly. Mostly because it's men that really appreciate a good fetish. Women will generally be freaked by plugs, then possibly amused and some fascinated. I'd recommend introducing the subject slowly.

Introducing the subject slowly:

Safe well make plugs are expensive, if you want to just give it a try.

After some research I can't really find a cheap 'sampler' plug. Mostly the cheaper ones are not well made, from materials that are far from ideal.
So I've asked Keith at PenisPlugsAblaze to make one. The result is The Feeler. It's anonymous looking, small and made to the very highest standards.

If you are tentative, but tempted then read more here.