The whole idea of furries begin with the idea of "Persona"
Persona is an image you make to interact with others, Like, Making people think you're tough.
But some people want to use their inner persona, Aka, They want to be free, So they make these new personas, nicknamed "Fursona", To interact with people the way they actually enjoy,
Some people love their fursona so much, They make a wearable version of it (Fursuits), The only reason they have been misunderstood of being all sexual and stuff, Is because furries are using their fursona as a lifestyle, Hence, Everything from their life is there, Including their sex life, Also, Furries accept everyone! Literally everyone! Doesn't matter, Gender, Sexuality, Age, Race, If you're a nice person, You're welcome in there.
In the end, Furries are just people who want to be free, Dance around, Hug each other, Have sex too if they want,
You can literally find these information on wikipedia