This is all about preferences, not for everyone I’m sure. With me it’s about chemistry with the provider. If there is a connection, and things start to get hot and heavy towards the end of the session, I’ll move in for the kiss or sometimes I’ll ask in a hushed whisper “can I kiss you?”. Granted it’s not a given by any means, but I can usually tell if it’s going in that direction and as such it’s usually reciprocated. It’s not something I would pay extra for, it has to happen organically and mutually, and when it does it really heightens my enjoyment! Just my opinion based on my personal experience, as with everything ymmv.