Pro's
1. Seeing SPs help to keep your head on straight. It doesn't put you in a compromising situation with girls who claim to "love" you, and stays off heartache. Also, I have found in my personal life, it completely does a 180 for the guy/girl dynamic when you are dating a girl and you see the early warning signs of deception and manipulation (I have yet to meet any girl who doesn't try that, or try to establish this early). If she tries that, you just secretly laugh it off, knowing you'll be seeing an SP sometime soon instead of wasting money on a date trying to court her, because of her behavior.
2. Seeing Sp's allow for a type of sexual freedom most men I know simply can't get in the real world, and impossible for one girl to compete with. Where else would a 19 year old blonde go to Hawaii with a 56 year old? (from another thread) Or being able to have threesomes at your convenience, or the variety of women in terms of age, looks, race etc.
3. If you can mange costs, it can be actually more affordable than a girlfriend or wife. You don't have to buy b'day gifts, take them out, or financially support them.
4. No chance of being betrayed by cheating. Yes, they are SPs, seeing lots of men, but you're not making that emotional investment of trust.
Con's
1. No chance of developing true intimacy, even if you're seeing them outside the industry.
2. It can develop into an addiction, which can then also become expensive to maintain and hard to control.
Seeing Sps are a distant second to a real genuine, trusting, loving relationship with someone you find physically and emotionally attracted to, but of the people I know, none of them have that. They either are going out with an unattractive nice girl, or having a hard time managing an attractive, messed up bitch, who more than likely frequently cheats on them.
Seeing an Sp can give you almost everything, but not intimacy, truth and trust. But then again, most girlfriends and wives can't offer that either.
I would summarize by saying SPs are the best compromise for men presently. This may not have been true generations ago, when women added to the lives of their men and took care of them, but that is not so much the case today. Of course you could really be lucky and find a girl who will see SP's with you, or other types of arrangements, but that is a rare find I think.