This movie has some of the steamiest love scenes I've seen in recent years.

steamiest 是形容词 steamy 的最高级形式。steamy 由 steam（蒸汽）加后缀 -y 构成，本义是"蒸汽的、多蒸汽的"，引申为"热烈的、充满激情的"，在形容爱情场面时指"露骨的、火辣的"。