Right. For example, there's the fact that all women look very old at 30 but everyone pretends that this is not the case. Everyone is eager to deny it, but 30 is already old, actually. Even for men, who age incomparably better than women, 30 is about the age where your flesh begins to fail you in various ways (silly microinjuries, much slower recovery, lowered T, the list goes on). You can obviously still be very strong and full of vigor at 30 (a lot of men are still very strong at 70, actually), but there are good reasons why it's rare for people like soccer players to not yet have retired by 30.
Something about the pathetic attempt to defeat the passage of time just by simply lying and pretending that it's not there really annoys me in a way few things do. There are some women in their 30s that my peers will say are still attractive. Really? You would "still hit that"? Let's go pick up girls at the local nursing home, pal. There's this baddie named Gertrude, she still got it, she's young at heart! Give me a break.
Nowadays, even at 25-28 a lot of women just objectively look like hags already. The other day at work, I (naive, clueless) asked a woman her age because it was relevant to the conversation (forgot that women get really weird when this question is asked), and she got this really obnoxious look on her face and said "guess". She looked obviously 30-40 to me, but I lied through my teeth and said 25, thinking I was gonna get some social brownie points, "teehee, oh stop it you, you don't mean that, I don't look that young". Nope, she was 23. What are they putting in the water and food that women deteriorate this fast? Or is it the endocrine-system-destroying birth control pills that they all take?