Friend requests....???

So i am not new really as i have had an account for a while and took a break (fell off the wagon) but really want to get started again. Anyway, just recently i have had lots of 'friend requests' from people with very erm... revealing profile pictures! Am i missing something? Is this a thing now or am i being spammed? I'm no way a prude but really weren't expecting to be greeted with that when you get a friend request on MFP haha!
Honestly i don't think there is anything dodgy about the my profile that would attract that sort of attention!
Any one having this issue?