Bad idea. This trait adds 20 sex atc, while prostitute adds another 20 for 40 sex atc total making possible to somehow use juicing from the start without CON investition. The main benefit of high CON is that you have extra stamina and can carry more stuff, like food, potions and explosives. For slut build i suggest 10 SCU, 15 (20 for cheese) SUR and all other points to CON. This way you can fuck all male enemies and nuke all others with mines and traps. If your play deepone Lona seawitch form will compensate 20 CON.not selecting "Nymphomaniac" trait
To not catch STD just use whore cloth - it will keep Lona clean.