The impetus for apps like Grindr, Scruff and Hornet (and before that, sites like Manhunt and Adam4Adam) was primarily sexual, giving guys a chance to seek the hookup partners they desire and do the dirty before moving on to the next. But it turns out that lust can evolve into love, and seeing as physical attraction is a healthy component of a good relationship, sometimes a trick turns into an actual situation, especi…