Yes, it's a heart and I think it's awesome.
Honestly who cares that I wear one. I get so much hate for them! Even tho gay people now a days are getting applauded and told they are brave, me, a straight man is looked down upon for wearing thongs and expressing myself in clothes I like.
I hope one day, thongs and also flattering underwear become mainstream for straight men. We deserve to feel good and sexy too.