Friendly anal fingering

For this morning you are scheduled to meet a friend of yours in the park, you decide to let him be the one to make you cum.

As you walk to the park you cannot resist masturbating your clit through the pocket of your jeans, you know that you are probably wetting yourself quite visibly but you don't care. You reach the bench on which you agreed to meet and choose how he will make you cum

"Old Rule: for girl friends its common to lie on the legs of a sitting male friend in a spanking position, this is very comfortable for the girl"
"Old Rule: When in that position the male will often jokingly put a finger up the girl's ass, touching her pussy is still considered taboo"

You just finished writing when you hear John "Hi, sorry for the delay, public transport..."
"Hii John, no worries"

He naturally reaches for your nipples and gives them a healthy pinch that makes you rethink your statement that you cannot have a nipple orgasm. Without losing a beat you snuggle into a spanking position, you start talking about your week. He has a tic that makes him move his leg left and right when he is passionate about the topic, so when he starts complaining about his boss he is basically fingering your clit with his leg, you are now very close to an orgasm and barely manage to say a "Yes" every now and then while he is talking.

"I'll stop complaining now, I don't want to bore you too much" he says, while moving your jeans down to make space for his hand, you are too horny to notice

"I don't mind, go on if y..." your voice breaks when you feel the tip of his finger pushing inside your anus. You instinctively clench, you are now cumming but since the stimulus was so light the experience is quite different from usual: the tension build up lasts a good twenty seconds, during this period you twitch your anus to drive his finger deeper, then the release comes, a sustained wave of pleasure so strong you don't even know how long it lasted.

As you regain your sense you hear John still talking unaware of what happened, he is also still rummaging your rectum not knowing that just an inch below your pussy is drenched in juices.