Do guys get horny from playing footsie?

A guy at my school keeps trying to touch me under the table during cl with his leg. i always sit with my legs crossed. and he puts his leg under my foot and leaves it there for a minute and then he does this several times. he did this when we were taking an examination. i saw him from the corner of my eye he was looking at me, and then looked under the table, then i felt his leg resting under my shoe. is this footsies? is he getting turned on by my shoe? whats up with this? we aren't even friends...we hardly talk. but we help each other with clwork.