One of the girls left the rest of a voicemail, introducing a new idea for a party that she's learned about from a certain internet craze: Nip Tweaking Parties. We were understandably apprehensive about undressing each other deliberately, although we'd seen each other naked when changing or showering before.
Long story short: us five girls agreed to give it a try. We sat around a round table of scented candles, took our bras off and gingerly started to touch each other's nipples. Soon we were glad we agreed.
Penny's and Sarah's breasts were C cups, with puffy nipples; Claudia's were almost flat, but with beautiful dark nipples and large areolas; Sandra's tits were an impressive E with soft pink nipples; my D cups had quite long protruding teats, which the girls started to tug and twist.
After about five minutes of exploring each other's nipples, they all became hard and aroused, so we decided to experiment. Sandra told us she's heard that putting rubber bands around them makes them extra sensitive, so we did. Having rubber bands wrapped around our nipples made them stick out so much, especially mine; a few girls commented that the sight was making them wet.
After rubbing the tips of each other's nipples which stuck out from the rubber bands, we noticed them going purple, so took them off. Instantly, all of our nipples felt tingly and appeared especially engorged with blood. When we touched them, it made a few of us moan.
We decided to spend the night doing as many different things to our nipples as we can think of. Sarah looked at the candles and showed us how she dripped a few droplets of wax on each of her nubs; Penny proposed we take turns to let her do the same to us. So Sarah coated each of our elongated nipples with wax; Claudia was the only one who found it a little too painful. We felt so naughty looking at each other's wax covered titties. When we peeled off the wax, all of our nubs were red and swollen, but even more aroused, so we then rubbed ice cubes on each other's sore nipples.
Next, Sandra returned from the other room with hairclips on her pink nipples, and a bag of hairclips to share. Without hesitation, we decorated each other's nubs with clips and started to flick them. Instinctively, we began shaking our breasts to make the clips move.
I caught a glimpe of a small basket of clothespins on the balcony, and quickly brought it in. Penny smiled when she saw them, took off the hairclips from her tits, and told us she's seen these used in porn movies, then showed us how it's 'supposed' to be done. She clipped a pin above and below each nipple, making the round sensitive nub stick out, then flicked her nubs. The same was done to every girl's nipples, as we were all simultaneously flicking another's heavily aroused nips. Sarah was the one who first said she couldn't take it anymore, stripped and began rubbing her clit.
Soon we were all masturbating with clothespins on our now very experienced nipples...