We were taking a break 3 months into our relationship. Scene boy and I.
I was interested in a mutual friend of ours, and since we were apart at the moment, walked down to his house and spent the morning with The Goth Kid. 2 second sex with a 2 in dick really let me down and totally squashed any interest I had in him.

We still had a day trip to vegas planned. We hopped in his piece of shit truck, that I thought was endearing when I was imagining him hung like a race horse. He informed me that a girl would be coming with us, and since I still had this stupid idea in my head that I might be able to get over his complete lack of endowment, I was jealous. I sat in the middle between them and pouted all day.
I dubbed her, Skinny Bitch.
Goth kid's brain was probably the same size as his dick, because he thought it'd be a great idea to let her and I spend the day at the mall together while he ran errands. The first hour was awkward and filled with half assed sarcastic comments from me to her about clothes or items we searched through in the stores. Eventually we were laughing and joking about my current fling with Scene Boy, both of our disinterest in Goth Kid, and the pathetic attempts of some vegas losers at picking us up.
Did they really think lines like, " You look lonely. " and " My friend thinks you're pretty. " would work?
We stumbily admitted both of our bisexualities. Interests and tastes in women. Ranging dangerously close to a definition of each other. We spent the rest of the time flirting and talking smack on men.

That night by the time Goth kid dropped us off he could see he wasn't getting any from either of us, and left us to each other. Scene boy showed up at my place and the night was looking promising for me.
I had gotten some kisses from Skinny Less Than Bitchy now and was making out with Scene Boy left and right.
Finally making a new music playlist on my computer and laying on my bed, I had them both there and the beginnings of a threesome was evident. I stripped her naked first, more interested in a well built female than a boy I've seen before. Scene boy tried to inject himself into the situation multiple times and each time skinny less than bitch would phase him out. Finally with a deep sigh she whispered in my ear, " He can touch you, but if this goes any farther, I don't want him to touch me. " I smirked at it wondering what was wrong.
My Scene Boy was rather pretty, why would she turn him down? " Are you sure, he's really good with his mou..." she cut me off, " You're enough for me. "
That sure got me going and within 5 minutes we were down to it and he was off the bed, angstily surfing the net with his back to us.
My advice to you, is that next time you get into a threesome, make sure everyones gets to play.