Man do I REALLY HATE when a virgin gets on this site asking for advice. I can give you a probability of getting caught by LE. another for each type of STD. another for getting caught by someone other than LE. The traces of your internet use and how it can mysteriously show up 10 years from now. The list is long and I do not want to lose your attention. If you are a virgin, this is my advice to you. Stay a virgin. Find out what is driving you to want to cheat on your wife. If she is young, beautiful and loves you, then spend every imaginable effort you have improving that relationship.
This is a bad habit and everyone on this site knows it. If you disagree with me, then discuss it with your family/friends/coworkers and see what they think.