Simplify the following text for a Grade 13 native English-speaking person.
Original: The study also indicated that increased ejaculation through masturbation rather than intercourse would be more helpful as intercourse is associated with diseases ( STDs ) that may increase the risk of cancer instead .
Simplified: The study also indicated that this would be more helpful than ejaculation through sexual intercourse because intercourse can transmit diseases that may increase the risk of cancer instead .