Why do men's legs shake when having sex?

[Anonymous]

I was giving a guy a bj and I could feel his leg start shaking. This has happened with two guys. Is this normal? Why do their legs start shaking?

[katiesmuff]

Muscle contractions from position etc affecting their thigh and leg muscles.

[raccotaco38]

orgasm? if its the whole time, there probably nervous.

[BravoHawk]

Oh yea, maybe if they have a small wang and you are super hot. That would make me hella nervous

[BravoHawk]

Like when they are shoting their load in your mouth or the whole time?

[Asker]

lol.no just when I'm doing it.

[BravoHawk]

Master! They must be fighting an eruption

[joshuaty2010]

Because he likes what you doing its orgasm feeling.

[sunseeker11]

ORGASM build up , girls get it sometimes too :)

[ak1981]

its a symptoms of pleasure...

[wob357]

Just proves you are doing a great job ...

[Sagittariusboy]

Usually it’s a good orgasm!!