If you had a cock and I had breasts we would be even bigger sluts than we are without them. And as they are our fantasy inventions, they would be designed with our own tastes in mind.
If you had a cock it would be the cock you grieve for; only average in length but solid and thick and angry and heavy; with a big meaty head for cramming into tight orifices and full pendulous balls that held a never fully drained reservoir of fresh cum. It is the cock of the prize quarterback, the celebrated teenage swordsmith, the trainee gigolo, that older boy with his fingers in your knickers on the school playing field.
If I had breasts they would be the breasts I long for; a full D Cup, held high under my neck but both dangling with perfect symmetry like two ripe pears to just above my rib cage. They would be topped with outsize dark aureole and thick stubby nipples for chewing on. They are the breasts of the common page 3 girl, the young Latin peasant girl forced into prostitution, that girl at school in the year below you in the tight purple tank top, who despite you being a spotty geek, told you her size and admitted they could never be big enough.