As far as I know, it's the opposite. Higher arousal lowers inhibition.... and to semi-permanently decrease inhibition you have to watch a variety of porn, read a variety of erotica, and flirt, also, you need to wear the right clothes. Every little action counts. But alcohol does the trick as well but that is only until you sober up.
So if you need a little push to lower your inhibition, you need to drink and/or vape weed....
I would start with Bobby or James, who seems the easiest to get in bed with... but it is not story driven so you need to be at the right place at the right time... on the other hand if you can start the Escort arc, then you are guaranteed one sex encounter, as the narrative is very linear and you know exactly what to do.