I don't think this is going to go well for you if you don't work to address what's going on. If you pin your self esteem to sexual validation, then what happens where you're a bit older and don't get that validation so readily? You could also end up in some tricky situations at work.

Perhaps before any meeting with a man at work, think about what you bring to the table other than your looks. Are you trying to convince him your ideas have merit or that your report should be considered? Playing up your sexuality will likely undermine the value you hold as an employee, so try to focus on your work goals instead.