Guys, how do you feel hearing about periods and why?

Obviously I don't share that many details with guys, but some of them freak out at the slightest things. Like seeing a box of tampons in the bathroom, or hearing someone mention it's the 'time of the month'. While non of them are disgusted by unused toilet paper or someone mentioning they need the bathroom.
I don't mind hearing about it.
I don't mind hearing vague details about it.
Hearing about it disgusts me.
Select gender and age to cast your vote:
Guys, how do you feel hearing about periods and why?
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