A mature lesbian who goes down on a young girl has a much better chance at getting her mouth and vagina cleaned up and wet, while at the same time giving her some oral pleasure. This is especially true if she's older than the young woman who is probably only in it for the sex, if she has any expectations of making love to her significant other in the future she is likely going to want to use the oral sex techniques she learned in order to get them. Young women may not be all that interested in the notion of learning how to give a female a blow job, but with some practice she'll learn how to finger her younger lesbian lover and bring her to new levels of pleasure. The best part about this is that even if she doesn't have anything in mind, she can still learn the art of fingering and oral stimulation..