I offer the girlfriend experience so kissing is pretty essential. I've had previous clients tell me that whether or not the escort offers kissing is a deal breaker for them. Some guys are perfectly pleasant kisses, unfortunately some also have slobbered all over my face (my nose even got wet once!), after seeing a client whose breath stunk of stale cigarettes the other week I'm tempted to put kissing (discretion) on my AW profile instead of offering it to everybody, although thankfully that particular client didn't go in for the kiss. Personally I don't count kissing as crossing a line from a service to a truly personally intimate experience (that only occurs when I'm genuinely attracted to the client which is almost never), and I also would say that kissing is something a lot of guys do look for so you may be limiting yourself by not offering it. At the same time though if you don't want to, don't! Make good business decisions but don't compromise your own peace of mind, I don't offer tons of things that are common such as anal or oral without protection which similarly limits me, but at least I don't have anything to dread because I'm doing what I'm comfortable with.