Is this or is it not weird?

Of course not, 38% of all house cats were adopted right off the street! This is perfectly normal, however if your interested in officially making the cat a member of your family and letting it into your home, you may want to start letting it inside a little at a time. Don't forget the litter box and of course to give the cat a name. Warning, giving the cat a name makes the attachment to him more real and profound! You'll fall in love and won't be able to let go!