Q:

Salam

Is it okay for male, unmarried teenagers to be asexual? 

ِA:

Wa `alaykum As-Salamu waRahmatullahi wa Barakatuh.

There is nothing wrong if a person does not experience any sexual attraction or desire. People vary in their sexual attraction. Some do not feel any need for sexual fulfillment. We have a few eminent scholars who were celibate and never got married: Imams such as Ibn Jarir, An-Nawawi, Ibn Taymiyyah are a few examples.

Although they were all great scholars who wrote and lived Islam, they never got married since they felt no desire or attraction toward the opposite sex.

So, it is OK for you if you are asexual and choose not to get married.

Almighty Allah knows best.