You're watching porn, and then you see something on screen that looks a lot like the something in your hand. Your dick twin! And suddenly, you feel a lot better about yourself. Suddenly, you feel like you're having sex yourself! Depending on what's done in the situation, 'dick twin' can be both a verb and a noun, and it can be both the actor on screen, and the little actor who gets way more screen time.
man (steve): wow that feels great.
twin men: what the hell are you talking about?
man (steve): you two inside me.
twin men: Myself (jesse) and my friend (austin) don't do this for free usually, we get big money for our twin dick.
man (steve): oh you big sillies!
When, in your group of friends, there are two friends who believe they are closer than anybody else and will continually ignore or make fun ofeverybody else because they are so "close" and have SO many inside jokes to share with each other. This quality makes them act and seem like dicks. Their friends that have been isolated sometimes question whether or not these two friends are actually dating because they appear to be so "close".
Person 1:"Hey, are the Dick Twins coming over tonight?"
Person 2:"Nah man, they're fine when they're by themsevles with us, but when the both of them are together I just can't deal with them."
Person 1:"Hey-not everybody's here yet-where are the Dick Twins?"
Person 2:"I dunno, they bailed on me man-they're probably out on a date or something because you know how "close" they are."
Used to describe something that makes your penis twitch/tingle. Nearly entirely sarcastic, it can be used to describe anything. Anything.
Did you hear the new Ke$ha song? It for sure makes my dick twingle.
Hey is your girlfriend deaf?
-Yeah dude, hearing loss makes my dick twingle.
Hey did you like that short film I sent you?
-Nah it was boring.
Oh... I wrote the script.
-Oh damn, well there were definitely parts that made my dick twingle.