So, we have a situation with the following:
1. Teenaged or young adults-a group known for level headedness, quiet confidence and eminently sensible on matters of gender and sexuality.
2. One gender being very much in the minority.
3. The majority gender gathering round to have a giggle over nudie pics.
4.In a professional/educational environment.
If you don't see anything wrong with that picture, then you either have no empathy, have no understanding of people and have entirely forgotten what it was like to be a teenager.
The fact that you brought up the bobbit jokes indicates you simply don't care. It smacks of the attitude "well females did this thing that time, so males get to so something too now". If a bunch of women were doing that kind of thing in an inappropriate environment making a minority guy uncomfortable, then it was a shitty thing to do. Having some guys do the same doesn't even up the score, it just makes the world a worse place.
It also indicates that you view the world in a binary males versus females fashion (why else bring up something females did? ) which is a dumb ass attitude which propagates problems and nothing more.