Similar to the hose, your feeble attempts at restriction only make the stream stronger.

There is a fundamental pressure being restricted. IF she has a bigger urethra than you, she'll wreck you. If she has a narrow urethra, she might be in the same support group as Hank Hill.

Either way, the fundamental limit of how much pee can flow will always follow a basic function.

Because of the inverse relationship between velocity and diameter.

Yes, partially covering the opening will increase flow speed, but it doesn't matter how long the hose was before you covered it, so no penis is required to achieve that.

You should try a twist tie, wrench it shut like it's bread you want to actually keep fresh instead of just twisting it up and tucking it under the loaf like most men do. See what happens!