Yea, I have 'thin privilege', down from 75 Kg to 63 Kg (small body type). Abs are looking OK but I put on a little more fat since moving back from Burma and finding food again.
What I do get called now (I'm amazed but it's true), is 'muscle guy'. Considering that my body type is generally 'weedy', the reason for this is simply my modest weight training, coupled with testosterone injections, (which BTW have also made my dong jump to attention every 10 minutes). Put a few small muscles on a weedy body type and you do start to look somewhat muscular.