So sometimes after I have an orgasm my legs feel really weak and shake.  It pretty much feel like I can't walk. And sometimes while having sex my leg will start shaking like a dog does when you scratch their belly and find the right spot! It's a little weird and embarrassing but I have been with the same person for almost 13 years and we are married so it's not a big deal but I just want to know why it happens. Lol I guess my husband know the right spot for me too!