Not pumping, but same idea, I jelq the day before we have sex. I wear a cock ring after so my temp gains are still present the next day. I prefer to do it the day before because even after all these years I still get horny while jelqing. If I am too horny when making love to my wife I simply don't last long enough. But watching her go down on me with my junk flush with those temp gains is truly erotic.