Thank you, added these lines :)

Fine.
And just to clarify and extend my answer on the About User component's page:

In case you don't own the Custom User Fields component but developed your one like this, you may simply add these two lines like

    // Add the new 'sexuality' field with options
    $return['required']['dropdown'][] =  array(
       'display_on_about_page' => true,
       'label' => ossn_print('some Label'),
        .....

to make your field appear on the About page