It is funny. I think it's hilarious and the fact he shared it in public makes it even more so. It's one of his most liked tweets, so a lot of other people also thought it was funny. Comedy is subjective, but if a lot of people think something is funny then it is objectively funny. And it is perfectly appropriate for public figures to reveal something of themselves and have some fun in public. Puritans will always be offended by this kind of sex joke, or by the gays being allowed to marry or whatever, but we laugh at them too, they make it even funnier.
In my opinion what would be inappropriate for a billionaire CEO, and reveal deep flaws in decision making process, and the decision making process of any government official or governing body who subsequently partners with that CEO, is to fraternize with the likes of Epstein after he was convicted, e.g., https://www.nytimes.com/2019/10/12/business/jeffrey-epstein-.... But I guess morality is also subjective so people might disagree with me there too.
In my opinion what would be inappropriate for a billionaire CEO, and reveal deep flaws in decision making process, and the decision making process of any government official or governing body who subsequently partners with that CEO, is to fraternize with the likes of Epstein after he was convicted, e.g., https://www.nytimes.com/2019/10/12/business/jeffrey-epstein-.... But I guess morality is also subjective so people might disagree with me there too.