hey, this might sound off putting at first but think on the positive side:
cut suspending ligament (thing that holds penis up in a forward position)
make part that becomes erect only effect the bit that sticks out.
remove testicles and cut open sack, creating flaps that can then form a pouch for penis to lay inside of, creating a natural flat look.
you could masturbate doing a "come heather" motion with fingers, pushing thumb to the base of dick (where it starts to bend back)
moving it back and fourth in it's pouch.
you can orgasm limp like this minimal refraction period.
when you orgasm, the clear liquid runs down and functions as lube in missionary position.
in doggy your partners balls hits your backwards looking "vagina".
pouch can also be used for "confined saber-rattling duels."
this is to minmax pleasure, nothing else..
shortening down the erect part and removing the "suspension" you get a more pliable penis that's also easier to stay hard in, and doesn't even need to be hard for orgasm.. ad that to prostate stimuli and it should bring a more pleasing experience on all parts.