That's the trouble with generalisations. I had a three-way with a Colombian language student once and his endowment was both considerably skinnier and shorter than a typical whiteboard marker. However, he was easy to get!!
I did watch some Bel Ami porn from 2016 recently. Now those boys are seriously endowed. I think that was implied by the name of the film which for those of you who engage in illegal activity is available as a torrent.