I used to be a guy who want to be WL's first of the day, but after a year of punting I realize that it doesn't make any difference.

However, recently I met a WL who I think didn't shower well in between sessions. During the session I feel there's a slimy thing under her boobs which I figured that its sperm. I feel awkward to point it out so I just didn't play with her boobs but at some point the WL grabbed my hand to squeezed her boobs.

Although I'm sure this rarely happened, I guess being the first guy of the day will make sure that the WL is in cleanest state.