When you cum in your partner to plant the seed, then urinate in them to release the feed. The nitrogen in the urine will fertilize the seed.
After a hard day of farming I gave the wife a nice seed and feed.
When a guy cums on a girls asshole...sticks his cock in the hole "Halfway" one or two times...then shoves the cock in her mouth.
Billy : Where did you go last night?
Jimmy: "I met this stripper who was willing to do anything, I fucked her she blew me, and I finished her off with a "Seed and Feed"....she loved it...and so did I..."
Billy: "Disgusting"
Jimmy : "I know, but in a good way"