As a former clerk, I can say exaaaactly. And even if we did care, which we don’t, it’s not like that would have any effect on your life. We don’t know you, what are we going to do, make a webpage at www.thisguyboughttamponshaha.net and describe you?
I don’t even remember seeing a guy buy tampons, but I’m sure it’s happened, and just didn’t register on my “things to pay particular attention to” scale.
But of course, from the responses here already, it seems I’m preaching to the converted.
My boyfriend would definitely pick up tampons if I asked him to, but so far there hasn’t been a need for me to ask.