性欲 ，这个意思是这个人有性的行为和欲望，他不是阳猥 性爱，这个的意思，做爱，男人和女人，做爱 性冲动，想找个人做爱，大概的区别就这样。比如说，那个女孩真漂亮，我有性冲动了。

性欲 the lust that makes you want to have sex 性爱 the genneral term of all kinds of sexual behaviors 性冲动 the impulse that urges you to have sex immediately

性欲 = 性欲望，肉欲 性爱 = 性交 冲动 = 神经受到刺激引起的兴奋性反应 性冲动= 想要性伴的冲动

That means what you are looking for the difference are among Love, Desire, and Nerve Impulsion.

这是个敏感话题