I wash up before I leave to see a lady. If I'm asking her to get up close and personal with *that*, it's the least I can do. Basic respect.
I've heard no end of horror stories of men who smell like last week's Indian food, or worse. Of course any lady would be put off.
I remember the legend Sylvié putting in her ad "if you can't wash before you come, at least rinse your junk."
I like my BBJ as much as the next dude, but a huge amount of this is on us, guys. Do like the lady said. Rinse your junk.