And this message isn't a direct criticism, but more to really help you be part of the community.
Before you post, before you think about being part of the lifestyle, please ask yourself this: "What do I bring to the table?"
If your answer is the length of your penis, you are really not ready to swing.
20something year old guys with 7"+ are two a penny, you really need something else to make you stand out.
Emotional maturity, conversation, demonstration of awareness on concent and boundries.
Sell yourself with your photos! A dim photo on your unmade bed of your dick with a massive untrimmed bush isn't going to get any attention. It shows lack of effort. If you don't think your photo is worth the effort, we doubt you'll put effort into hygiene or actual sex.
Oh, and if you are under 25, perhaps under 35, unless maybe you are a body builder or a fireman, don't list yourself as a bull or a dom. In all likelyhood you really have no idea what those terms mean, and are completely unable to live up to them. Not to mention most couples aren't looking for that anyway.
Oh and dicksize, providing it's not tiny, really isn't as important as you think. If you think it is, you're not ready for this.