It is Absolutely Haram.
Brother, One of the distinguishing features of Islam is the rulings on Modesty. Islam teaches us modesty and is strongly against shamelessness.
Prophet Muhammmad (SAW) says:
'The Iman has 70 departments and haya (modesty) is one of them'
In Quran Allah says:
'Tell the believers to lower their gaze (from looking at forbidden things), ...
It is permissible for a suitor to look at the natural beauty of girl which will induce him to marry her. In fact it is recommended by Holy Prophet (pbuh) who said : “When one of you proposes to a woman for marriage, then if he is able to look at what will induce him to marry her, he should do so.” (Sunan Abu Dawud and Musnad Ahmad).
The natural "zeenah&...