He brings sex into everything, so I suspect that sexual jealousy is part of his problem :D
The one who says he doesn't is a liar ;)
Psychoanalytical assumption is that other types of curiosity, particularly that one that involves acquiring the knowledge (like in latent phase of PS development, when kids suddenly become totally asexual apparently, best years for school, after oedipal phase) are derived from SEXUAL curiosity. That is the basis.
And Freudian thesis about final source of curiosity being sexual by nature is just the tip of the iceberg that includes later theories of their relationship, they seem to be inseparably intertwined, sexuality and curiosity.
Sexual jealousy, what is that suppose to be? When someone's wife is banging with the neighbor at the same time that person (hubby) experiences heat pump cycle's peak ? :)))))
I think you meant envy, not jealousy (jealousy is a stage for 3 actors, threat of loss of someone important, etc.) :)