First things first, when a guy gets aroused a large amount of blood flows into a sponge like material inside of the penis to become hard. Like the blood everywhere else in your body, it circulates. As the blood circulates, sometimes you can feel it pumping in and out in a "throbbing" way.
Because men and women can rarely just be friends... do him a favor and cut him lose since you plan to friendzone him...
It's just a natural reaction which we most of the time have little control over. He's aroused by your level of intimacy. It does not have to mean that he wants your or secretly have a crush.
His penis is throbbing because he's excited about fucking such a beautiful, sexy young woman. That's my guess, anyway:)
If he's your teenage age, his penis will likely throb. That's what they do.
Yes. It's completely normal, and probably means you're turning him on.
You made him sexually aroused, that's why his penis was throbbing.
He just got a boner, thats all. He's attracted to you.
It tends to happen when I'm really turned on
Sounds like a he's got a tumor
Yes, that is normal.
Yes, He is sexually attracted and aroused by you.
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