Several in this thread doth protest too much. Just sayin'.
Studies have scientifically proven what was already obvious to most of us.
Studies... You can find a so-called
study that attempts to excuse, legitimize or impugn virtually anything nowadays. That doesn't always mean that the findings or conclusions are necessarily correct.
Scientific studies have been used to prove a lot of things that we have later learned to be false. And, your
obvious love for cock is irrelevant here.