If it is about your attractiveness as seen by women, I can assure you that being somewhat effeminate is very attractive to many women. If it is about people assuming you are gay or bi: That happens to myself, and I just see no problem. Others may, but that's just wrong on their side - and is quickly changing in public opinion currently. And being attractive to more people is not really bad, right? You may just need to learn to let others know that you are "straight"/hetero when appropriate, like with some prepared joke. — Volker Siegel 1 min ago

I think the question means something completely different when asked by a professional clerk. He asks whether it needs to fit you, or somebody else to avoid to just annoy you by advising you regarding sizes etc. And if he even thinks about cross-dressing or not, it means he is just not professional - that's his problem. — Volker Siegel 37 secs ago