Nah, you seem closeted and insecure for even saying that. OF COURSE straight men can tell if another guy is handsome, which is why we might feel threatened by another good looking guy taking our woman away from us. Not only do us straight guys notice another good looking guy, but we react to him by holding our girlfriends closer or try and steer her away from him if we are walking towards him. In the gym, we admire the physiques of other men because we want to look like them. And some other guys are just plain good looking guys that we notice because they represent the ideal type of guy we want to emulate. Your comment is coming from a dishonest place, because you are afraid that other straight guys might think you are gay or closeted. I can assure you I am as straight as they come, and I can and do notice other handsome dudes when I see them. Get real.