There was a scene in one of the IDW comics where teenaged Shining Armour meets Cadence for the first time, and says "hello" to her. The way they typed it, to me, made it sound like he said it out loud and with a frog in his throat. So funny! She's probably talking about that here.
Meh... pony dudes. I guess they are smoother with the ladies because A. There aren't that many for mares to choose and B. Because they grew up with mares, so they can find more things in common with them