If you hapen to switch from female shape to male shape or vice versa and the tattoo on your chest appears deformed, there is a fix for that so it looks good.
Every time you switch from female to male shape or vice versa and later want to use a tattoo on your chest and prevent it from looking deformed, please follow these steps:
1 - Restart your Second Life viewer and if the tattoo on your chest still looks deformed do the following:
2 - Reset default (target sex) avatar. Go to Avatar menu > Avatar Health > Reset Default (target sex) Avatar...
3 - Finally wear your (target sex) outfit and your tattoo.