What's your opinion on two straight guys kissing ?

I have seen in many dating reality shows where guys are looking to date girls , often two guys become bros and they kiss with even tongue. They are supposedly straight since they are seeking girls. Then in some videos two straight friends kiss each other as a dare. I think maybe two straight guys can kiss like touching lips for a moment but if you're using tongue and for more than 5 seconds , you are at least bisexual.