Breast implants move when squeezed. Is this normal?

When my boyfriend squeezes my breasts, they move into my chest (when laying down) and it feels like all there is to squeeze is my old boob and skin. Are they supposed to move into my body when squeezed? Its like there no implant to squeeze. Also, when we're having sex and I put my hand out, my breasts become hard because the muscle contracts. Is there a way to fix this? Im 1 year post op.