If a woman takes the time and trouble to make herself look pretty, wearing the right clothes, having nice hair and make-up, then wouldn't it be only polite to acknowledge the fact and signal one's appreciation?
There was talk some while ago about wolf-whistling being banned on the grounds that it was politically incorrect, immature and deeply offensive but there are still plenty of ladies out there who would feel the secret glow of personal pride in receiving such a tribute while they strolled past as evidence that they were still attractive to the opposite sex.
It merely means that you're still eye-catching enough for men to bother whistling at and it's no use being a head-turner if nobody lets you know that they're impressed by you.
And don't tell me that the minute you're with friends you won't proudly confide Someone wolf-whistled at me today!
Others, of course, would either frostily ignore the intended compliment and burn inside with moral indignation, directing a severe glare at the well-meaning perpetrator but i can state here and now that i have never once wolf-whistled at any woman.
This is due to the fact that i was never able to master the dubious art and have therefore restricted myself to mere ogling but many's the time i wished to signify my appreciation of the perfect female figure with a friendly little whistle.