When after the physical act of love closeness is needed and one wishes to lay on their partners chest to feel close, relaxed and fall asleep on his/hers chest. It describes not only someone laying in a their sexual partners arms but the emotional side of it. The word is only valid if a relevant amount of love lays between the couple.
Manly chest love describes the act with a hairy chest.
She needed some manly chest love before drifting of into sweet dreams.
On the rocking boat his chest love comforted her.