Every man is different. Studies show the distance a man can ejaculate is largely dependant on how aroused the man is at the point of orgasm. Some men can "paint" the ceiling while others can barely cover their fingers. The more excited or aroused a man becomes, the increased blood into the penis allows the penis to increase in size as well as start the semen to prepare to expulse.. When the man orgasms, the contraction of the penis propels semen into the vagina, onto one's hand, or into someones mouth or anus at a phenomenal rate of speed. The intensity of the orgasm will determine the distance a man ejaculates.