MIRROR: Download from MEGA
It isn't all that strange, it's a pretty common kink. The person I mentioned is mostly vanilla, but was taking my best friend shopping with him for them, because he wanted to try wearing pretty undergarments. Also, if the place you're thinking of is La Vie En Rose, they have male customers fairly often. If it's not, so do most other places, but I know La Vie En Rose first-hand.
Just walk in like it's normal, look for things you think will fit, and ask for a change room.
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