Simple thoughts and suggestions:
- Shoot a photo of yourself topless. Expose your shoulders. You don’t gotta show off your nipples or any other private parts. Typically you look sexier by NOT showing off TOO much.
- Show more flesh: The more flesh you can show without breaking laws is good. Flesh is the future. People like flesh.
- Make eye contact with the lens: Look directly into the lens, and slightly open your lips. Parse your lips — the look of “expectancy” makes you look sexier.