Mmm…read this post, it might help you. What pheromones can and can't do: realistic expectations for newcomers
Alrighty, back to the point. Well you could use alot of chatty mones, pair up instant openness with instant honesty. He’ll get all chatty and might tell something interesting 
Pheros will enhance things for you, if he isn’t a chatty person, pheros will make him a bit chatty than normal. But it might not make him magically blurt out things that you might want to hear. Like, I mentioned pheros just enhance or give things an extra kick.
Instant honesty might give you an intimate conversation, and not neccessarily, make him blurt out the truth so fast. You’ll have to give subtle hints too
Good luck sweetie 