Suzuki is actually a somewhat useful character for the series, serving as a reference point for a genuine guy from that universe. Without him, we would know even less about what makes Sou so special in all those girls' minds. Of course Suzuki is actually a bit more resilient already than an average dude, if I have understood it correctly. It might be due to his wish to see yuri couples everywhere, so his interest in the girls he wants to view as lesbian does counterbalance the normal terror women strike into the men of that universe.