Though captain's interpretation is right in its own ways, it could be interpreted in another way:

'Women need love to 'give,' or have sex while men need sex to feel being loved.' The difference is subtle in the sense that both want the 'love' but men can't feel being love until there is sex, while a woman won't have sex until she feels she's loved.
Thus, ultimately what this means is that a guy needs to convince a women that she is in love, so that he can have sex and then this will lead him being in love with her. Of course, when both are in love, the sex never stops. And yes, this is a generalization.