I was teaching school and had 3 college age girls living next door. They knew nothing about how to fix anything and they kept asking me to come over and fix the sink, a dripping faucet, etc. One day two of the girls were out but the one that let me in the house was about halfway undressed. She bumped into me about 3 times, letting me know she needed some attention. Before too long, we were fucking, and then in walk the other two. They first acted like they were shocked, but soon started giggling, so I knew then it was a set up. The other two joined in and after that, it was just a quick phone call "come over, we need you". It was a great year.