Think about it like this: Have you ever noticed that after running your legs will sometimes get really sore & wont respond to you as well directly afterwards? Well, sex and ultimately the orgasm have a similar effect. It's completely normal, it just means your legs are tired.
LOL "yeah if your fat". It is not weird to have shakey legs after sex, as all the adrenaline is rushing through you and especially if you have multiple Os during the intercourse you will feel like your legs are jelly-like too.
Not if ur the one doing some work, if u were just laying down, idk lol
Yeah if your fat