ok so me n my gf were have a lil picnic n no one was around so i got on top of her with my clothes on (i was wearing shorts n so was she)n then i started dry humping her n i noticed that she started to pant more n more so my question is why did she start panting is it caz i was rubbing up against her vagina or wat?
Yes, it may have mainly been that. She was getting sexually excited, her heart rate increasing, therefore being short of breath.