First time I came across those little beads under the foreskin was when I took a long haired lovely from the Bamboo bar many moons ago. When we leapt into bed, lights down low (his choice...don't know why, I'm so cute..) and my fingers alighted on these little lumps on his dick, well, I shot out of bed thinking he had genital warts.
I calmed down after he explained! Don't mind them now.
Dicks that feel like they belong to the Michelin Man are a complete turn off however.