My boyfriend checks my pad?

Ok so ever since me and my boyfriend started dating , every time I’d get my period and would be with him he’d feel my underwear to check if I’m wearing a pad. I don't know if him being Haitian has anything to do with it , if it’s a cultural thing but can anyone tell me whyyy he does this? He doesn’t literally look to see it there’s blood he just feels my underwear every day (if it lasts 4 days he’s check for each day etc)
My boyfriend checks my pad?
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