Oh, that's a plausible perspective I hadn't thought of!
I had interpreted it more in terms of when people just blindly trust in him, it means they're not sharing in the challenge and responsibility of the job/relationship. That he wanted (especially in the relationship) someone to run along side him, to say what they really think and really want, rather than to leave him leading all alone - which means he has all the support and gets to do things his way, but also has all the responsibility without ever getting their genuine feedback.
Or something roughy similar.
So in that case ...i think the comparison with a woman part was because of spontaneous sex cause women can self lubricate and stuff ...and even when gay couples are stressed and need quick sex to relax they must prepare first.
Previously i thought when he said: "if it were a woman they would have already..." meant that if it were a woman they would have already begged for more and be more demanding ( since the drawing of woman is an eager woman opening her vagina. and since makino is blindly following the wave not stating what he wants from kamina.)

Why would kamina be unsatisfied when his coworkers just quickly blindly accepted his proposal why would kamina be unsatisfied when makino fulfilled his every request blindly? Is it cause he wants his workaholic nature be satisfied by a challenge in interviews? Is it cause in sex he wants to be needed more challenged more wanted more... rather than docile fulfilment of his request
Why he wants people to play HARD to get