Well, young females in sports' evnets - a challenge for the fantasy of MedFet'ers!
For me too. I like to watch soprts with female athletics. They are young, slim, well trained; nowadays, they wear sports' clothing which leaves their beautiful belly uncoverd - and you see their belly buttons, how they move (I say always "they speak", because sometimes, they look a bit like a mouth ;-). You see their sweat runnig down their beautiful bodies - and you virtually hear their heart beats !!! And at the end of, for example, a 100 yards run, they are completely exhausted. Imagine their heart rate !
She pulls of her tricot, peel of her wet sports' bra, she gets goose pimples at once; in her slim chest, you can see her heart beat, and then, you put the diaphragm onto her apex. Can you imagine, what you hear ?!? The diaphragm of your stethoscope sticks to her wet and hot skin, and there is this lovely sound, when you lift off the Stethoscope from her skin...
And she breethes deeply and heavily; her nipples are rock hard, her face is red. Her eyes are lowered, she doesn't know where to look, because she is embarassed: You are hearing, seeing, feeling, smelling everything of her most intimous interior...
That's what comes into my mind, when I see women at sports. Every time...