“Source quote please”
Shulchan Aruch, Even HaEzer 21:1
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A person must stay very far from women.
“Why would I give a hoot what a gentile does on an airplane?”
Forget a gentile. Do you insist a Jew should buy second seat rather than making a seat change request to sit next to a family member, away from a baby or closer to the exit to quickly catch his connecting flight leaving shortly after arrival of the current flight?