Straight man who might use straightener

• Well-groomed urban hetero
• Latter-day Beau Brummell
• GQ sort of guy
• Fashion-conscious fellow
• 21st century popinjay

Wikipedia Word definitions in Wikipedia
Metrosexual is a portmanteau of metropolitan and sexual , coined in 1994 describing a man (especially one living in an urban , post-industrial , capitalist culture) who is especially meticulous about his grooming and appearance, typically spending a significant ...

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
by 2001, from metropolitan + -sexual , ending abstracted from homosexual , heterosexual .

Wiktionary Word definitions in Wiktionary
a. Of or relating to a metrosexual or the metrosexual lifestyle. n. 1 A man concerned with personal appearance, such as personal grooming, fashion, and aesthetics in general. (Usually urban, heterosexual, often affluent). 2 A man who is seen, sociologically, ...