"everyone should get more aromantic" can appeal to tumblr's sensibilities but I genuinely think everyone should also get more asexual. I don't mean everyone stop having sex, what I mean is
Sex is not essential. You can live without it. Full stop.
Not having sex isn't shameful or a sign of failure. It also doesn't make anyone boring.
You are not entitled to having sex with anybody and nobody is entitled to having sex with you.
Sex is not what makes someone an adult.
Nobody's worth is defined by how much sex they have or don't have.
Sex is not equally important to everyone.
You can have fulfilling and happy relationships without sex.
You should only have sex on your own terms, not because you feel like you owe it to someone, or because you feel like you'd be incomplete without it.
Know your boundaries around sex and be firm about them. Know how to respect other people's boundaries.
The previous point also applies when it comes to discussing sex. If someone doesn't wanna talk about it or hear about it you have to back down.
Anything can be sexual but not everything has to be sexual.