Who Has A Longer Penis?

Relatively speaking, no matter who you are,

$OP\gt OQ$

and as

$v\rightarrow c$

$\left.\begin{array}{l}t=\cfrac{v}{c}x\\t=\cfrac{c}{v}x\end{array}\right\rbrace\rightarrow t=x$

which is why the graph is better shown with $v\rightarrow \cfrac{v}{c}$.

Who has a longer penis?  You, or you traveling at speed $v$?  It matters only if you are facing in the $v$ direction.  In the direction perpendicular to $v$, you are equally disadvantaged.  And it matters who is measuring, you or an observer at rest.

The traveling length $OP$ as measured by a rest frame becomes $OQ$.  To an observer at rest, a length $OP$ traveling at $v$, lengthwise, is contracted to $OQ$.  A fast travelling space ship appears shorter, as it zooms past.

And to a travelling observer, a length at rest $OQ$ is measured to be longer, of length $OP$.  To the spaceship as it zoom away at high speed, everything stationary, elongates.  And a point of star becomes a line.

$O$, $P$ and $Q$ are simultaneous points.

Your penis, travelling with you is still the same wienie length to you, no matter how you measured it.

Have a nice day.