Literally every pursuit, especially if it is between people within prime fertile ages and slightly beyond, involves someone eventually wanting to have sex with the other. On a scientific level, this is how we are programmed. It is how our species survives.
Almost every interaction or thing we do as an adult human being involves asking ourselves two questions - 1. Can I eat this/Will this thing help me eat, or 2. Can I have sex with this/Will this thing help me have sex?
Virtually every person you meet of the opposite sex, you’re immediately ascertaining whether or not you find them sexually attractive.
These are not opinions, these are scientific facts with how we are programmed.