To straight dudes: have you ever been sexually interested in men?

For those who self identify as straight, have you ever fantasised and/or considered being sexually involved with men? If yes, when did it occur for the first time and what exactly did you imagine it to be? Would you be more inclined to act upon it if there was a guarantee that it’d stay forever a secret?

Edit: people pls read - the question is “have you ever been”. You can identify as straight now but still have had a curiosity or fantasy in the past. This would not make you bi IMO. Many strong opinions here:)