It was a summer course in physics for adults, most students were around 18-19. One of them was a really cute shy girl. She frequently asked for help, and seemed so flustered every time I leaned over her desk. I'm pretty sure I made her blush several times. I noticed she would sometimes sit and just squeeze her thighs together. Sometimes I would tease her by putting my hand on her shoulder casually, or standing really close to her as she sat at her desk. She would sometimes look at me and bite her lip. I have to admit that I fantasized many times about her. Making her do 1on1 teaching sessions, bending her over, and taking her. I imagined just walking to her desk after everyone else had left, and just put my cock in her mouth. Or as she stood up, I'd bend her over, lift her skirt up, and stick my big throbbing cock up her wet pussy where she stood.