Sex after kids .

How many women out there feel like sex is so much different after kids? It's been almost 3 years since I had my son but I don't know if it's just In my head that it's not as tight or if it's really not right anymore. It's starting to affect our intimacy bc my husband assures me everytime it's great but for some reason when we have sex any other way but doggie style it just doesn't feel like it's in there good enough!! Please share if anyone feels the same way!