Floyd Mayweather -- I Love Amsterdam ... Yeah, I Hit the Red Light District

With Floyd Mayweather back in the U.S. after a quick trip to Amsterdam ... we had to ask the obvious question -- did you make any purchases in the legendary red light district?

We know Floyd was there this week -- he posted a pic in front of one of the city's many legal brothels ... along with the caption, "If you pay, you can slay #bendover #howmuch."

So, did he or didn't he? Watch the clip.