Which American actor said "See, the problem is that God gives men a brain and a penis, and only enough blood to run one at a time"?

Explanation

Robin McLaurin Williams (born 1951) is an Oscar-winning American actor and comedian. There is no doubt that this is a funny man. A real Robin Williams quote is the following: "See, the problem is that God gives men a brain and a penis, and only enough blood to run one at a time."