Hmm, I tend to only add pics to torrents without any preview pics - or if the current ones are misleading enough that it conflicts. Since porn is extremely superficial and we all have our preferences, I try to include one pic of "everything".

Such as:
Each face.
Each dick (to show circumsized or not)
Body Hair/Body Shot
Each Position (oral included here - usually fused for 'dick' shot to show if un/cut)
and Penatration (to verify or let others know that it may say bareback but clearly isn't.)

Anyway, maybe as a sort of 'fix' for pic spam, the current gallery module could be fixed to require said photo slots as a max?