"In heterosexual men, pictures of rotting flesh, maggots and spoiled food induce the same physiological stress response as pictures of two men kissing each other. That is the surprising finding that was recently published in the peer-reviewed scientific journal Psychology & Sexuality."
https://www.psypost.org/2017/06/straight-mens-physiological-stress-response-seeing-two-men-kissing-seeing-maggots-49217
https://www.psypost.org/2017/06/straight-mens-physiological-stress-response-seeing-two-men-kissing-seeing-maggots-49217