Tawny's career of sorts and celebrity status were first and foremost based on her looks which in her prime were comparatively natural and wholesome All-American-Girl-Next-Door'ish (I liked her freckles, I really did, same with Kim Basinger, Gwyneth Paltrow, Julianne Moore and Jessica Chastain), bottled red mane and playmate gyrations aside.
She wasn't in WS videos because she sang or played guitar so well, she didn't play in movies because of her method acting talents and David Coverdale didn't fall in love with her because she was such an interesting discussion partner in astrophysics or devoted her life to famine relief in Ethiopia.
So with her of all people, I understand that she considered her looks a vital part of her professional life and wanted to preserve - if in vain - a youthful appearance. Especially in America, where beauty ops are so much more commonplace - as usual we are lagging about 20 years behind in Europe re that sociological development.
We are nearing an age where 100 year-olds will no longer be a rarity. But nobody - women especially - wants/is allowed to look older than, say, 50. Beauty ops are here to stay.
But why she didn't find someone who did a better job on her looks is beyond me.