Don't get the cloud of excitement and rush of seeing someone 'new'; about getting sexual pleasure from a complete stranger let cloud your reason, that's half the reason why we all see SP's in the first place. A lot of the pleasure and lust is incited by PORNOGRAPHY.
SP's are paid companions and thats about it. Believe me they don't have a lot of good things to say about us hobbyists. At the end of the day, its all business, I mean thats why they do it in the first place - they are motivated by the almighty dollar and they do sexual acts so much, its almost as if they are completely 'numb' to the experience.
If your woman at home just isn't doing it for you, then figure out the reason why that is and try to address the issue. If she's not attractive enough for you, then maybe you should re-evaluate what you see in the MIRROR and honestly speak for yourself: do you deserve better? Are you in the gym 6 times a week and is your wife a slobbed out whale eating potato chips on the couch? In that case, I could understand your argument.