Cape Town - Applying for a visa can be a bit of a nightmare.Earlier this year biometic data became part of the Schengen visa application process for South Africans, with the requirement already a standard for United Kingdom visa applictions since its inception in March 2009.A recent poll conducted by IXPVisas.com revealed the lighter side of this sometimes harrowing process. They asked over 1 450 travellers what the weirdest entry requirements were they'd ever encountered during a visa application and there were some pretty crazy responses. Here are five of the funniest:1. "Describe your moustache/beard" - one respondent claimed to have found this on a Mexican visa application form, with the options of scanty, bushy or clipped to choose from.2. "How many wives do you intend to bring?" - apparently asked of a travelling businessman on a Middle Eastern visa application. (Also a good question for a certain head of state!)3. "What side of the bed does your wife sleep on?" - two respondents were asked this by US authorities.4. "Foreigners please sing in the box" - a typo seen on a Mexican immigration form.5. "In times of either peace or war has the applicant ever been involved, or suspected of involvement, in war crimes, crimes against humanity or genocide?" Asked of overseas students entering the UK.While some of these questions may seem a bit ridiculous to those looking to enter another country, it often helps to highlight cultural differences, according to Liam Clifford of IXPVisas.com.