My straight coworkers keeping smacking my ass and groping me

I’m 21 gay man and my coworkers know that but yet they continue to smack or grope my ass and it makes me so hard and makes me wish they just follow me to my car and rape me after work. They’ve teased me saying they’ll make me suck their dicks or fuck me.

They know it flustered me too and I don’t know what to do. I need some help and advice, DMs open.