Am I superficial (sexually) when it comes to height?

So I was at a pool party and I was in the middle of changing in the bathroom when a friend of a friend walked in on me. I think she was going to use the bathroom for the same thing and I think she thought there was no one else around (she was in her underwear).

It was embarrassing because I had only my shirt on when she came in and for no particular reason I was semi-erect at that moment. She quickly glanced down at my penis, then at me, and quickly left.

I saw her a little later after we'd changed and we were both in our bathing suits. I don't know why but she's a lot taller than me (I'm 5'6" and she's like 5'10 or 5'11") and when she was staring down at me I felt somewhat less manly so I avoided talking to her. Am I superficial to feel that way with a woman who's taller than me?

Am I superficial (sexually) when it comes to height?
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