I first started visiting WLs when I was 24 or 25. Typical young bloke, frustrated trying to get a root at pubs, so initially it was the convenience but soon I really started linking the variety. Like one of the other posts, I love women and the female body, and just need that variety to explore. I'm kinky too, and I liked how open WLs are compared to 'most' women.
As I got into my 30s I was more confident and had my share of girlfriends, but I never stopped visiting WLs
Then I got married, but I still needed the variety. Sadly, my wife pretty much let herself go the moment we got together (even before we tied the knot - more stupid me) and isn't remotely experimental, so the decision to keep seeing WLs was easily justified in my mind. Actually, I thought it made for a happier home life, because I wasn't frustrated about the sex and we now have a wonderful family.
Because I am very protective about my family I always had (have) a rule about only seeing WLs because there's no emotional connection or trace. And ironically it was because I once broke this rule that I was caught out cheating..! Luckily for me I didn't lose my family, but I will never have an affair again.
I haven't seen a WL for some time now, but that's more due to circumstance and finances.