Is it normal to wear a bra and imagine i have boobs?

So you're a dude that likes to crossdress? Normal.

Now put on a wig turn round and we'll get this party started Roxy.

yes it is normal because you're just curious it's not like you have feelings for your sister

if you're a straight guy that likes to pretend he has boobs and wears women's undergarments? lol NOT normal

It's not normal, but there's a word for it and a state-protected class that does it -- trannies -- so I have to pretend it's normal :)

are you a boy or a girl?

Before I respond, what is your gender?

Hahaha

The only weird part is that the bra is your sister's.

Use fruit.