How come when 2 guys kiss ppl say it's gross, but when 2 girls kiss guys think it's hot?

when 2 guys make out poeple are always like "EW" but when 2 girls make out guys are like "THATS SOOOO EFFEN HOTTTTT".............. ALSOOO Why is it when like a guy sleeps with TONS and TONS of girls ... there like considered a KING but like when a girl sleeps with TONS and TONS of guys there a slut or a whore? IT'S STUPID AND SEXIEST IF YOU ASK ME !!!