However, males have to ensure they do not displace their own sperm.
This variation is hypothesised to be a male's attempt to eliminate, if not reduce, his.
It tends not to share the common blue tint with a vein however.
As a result, this adaptation also leaves the sperm less vulnerable to sperm displacement and semen loss.
It is usually accompanied by.
These relations between penis size and attractiveness have therefore led to frequently emphasized associations between masculinity and penis size in popular media.