Whenever I see these dick enlargement threads I think "so this the male version of hamstering." It's why you see so many dick enlargement ads on porn sites. Do whatever you want, but stretching your dick manually seems kind of intense. Don't forget that a woman's biggest sexual organ is her brain. In my experience it's the guys who care more about dick size (i.e. dude's talking about how big their dicks are other guys, male pornstars having big dicks, "dick measuring contests," etc.)
Full disclosure: I have a totally average-sized dick.
Full disclosure: I have a totally average-sized dick.