So really the only thing weird about this is you making it weird. You really ought to stop being such a pussy…she is your mare friend after all. You take a deep breath and your toweled hand disappears under her abdomen. Initially you aim too high and hit her ticklish belly button nub—earning a giggle from her. You move down, and down, and down…holy crap how far do you have to go? Eventually your hand gets pushed out by a fatty mass. Cupping it, you find that it’s much smaller than you anticipated, kind of like a tennis ball, but cut in half. Her tail flicks a few times in quick succession. From the ‘brief glances’ you’d had before you knew they weren’t very substantial, but the tactile sense added a new level of depth to that knowledge. They have to fit between her hind legs so you guess it makes sense.