Just tell your friend you want to suck his cock and swallowed his cum again before it's too late

This is a story about two friends who had sex before and they just pretend nothing happened. However, one of them really wanted it to happen again. He just don't know how to ask because it might end their good friendship. But despite of risk of losing his friend, he still tried to ask if he can suck his cock and swallowed his cum again. He was surprised with his friend answer.