My girlfriend's friend peed alongside me in the urinal. Should I feel bad for being so turned on?

So yeah she came alongside me and she definitely recognised me. She said "hey, I'm so sorry but I really need to pee"
She pulled down her leggings and underpants and began peeling with her ass to the back of the urinal. She let out a sigh and noticed me staring
She winked and said "you shouldn't be looking". When she finished she shaked and pulled her pants back up. As she left she said "maybe you can watch me wee wee some other time". Wow... should I feel bad for being so turned on by this event? ? What does it even mean? ? :-(
My girlfriend's friend peed alongside me in the urinal. Should I feel bad for being so turned on?
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