Yes, when you touch a guy's wang or wang sack he's going to be pleased. That's what you'd expect. Everyone knows this because it's true; unless a guy has stage three jock itch or is recovering from a circumcision it's a surefire bet. You'll sooner find a bi-lingual unicorn than hear a guy say, "Oh no, no babe, don't go down on me, I want you to keep tickling my forearm."
But I think your question seeks a more contemplative answer. Unfortunately (or fortunately) all guys are wired differently. Some guys might love a sturdy foot rub. Other guys might hate that, but cream their shorts if you lick their earlobes. The key is not to assume all guys like X, but find out what your guy likes. It's all about their particular nerve endings, their psychology and equally important: what they're comfortable with.
The comfort thing is a biggie. What feels good isn't always what your man will ask for. He might think it's not macho to have his toes sucked. He might think it challenges his masculinity to have you kiss his nips or (The Big One...) explore in butt play.
I'm not saying he's a sexually repressed zombie if he doesn't have a huge erotic spectrum, but I will say the prostate isn't just a river in Egypt.
I was a bit iffy about this "new-funny-guy" concept, but I have decided that I can dig it :)