"Mhmmm, they're lots of fun, hard for other things to compare~  Anyways, girls tend to compare a bit better, since they know what feels good.. Admittedly, you're new to it, but I'm sure you're figuring things out. Right?" She pushes a second finger in and reaches a bit further into 'Karen', leaning to kiss her neck. As she does, her breasts push up against Karen's back, nipples quite noticeable even through her coat.