Should I let my fetish embarrass me?

Ive always been with pretty vanilla Men, but deep down always wanting more spice. I have been exploring the bedroom with the guy ive been seeing. The sex is the best I’ve had & it seriously keeps getting better & better. So now, I have found a new fetish of mine, but I’m unsure how to feel. One time he happened to make a mess out of my neck. I’ve always HATED hickies. If I ever did get one, I’d be always frantically try to cover it with makeup or clothes, because If you don’t, People look at you differently. I mean, how dare you like sex! However, those bite marks TURNED me on! Even tho I liked it I asked him to stop although he didnt. Every time he kept messing up my neck & soon, I found myself getting extremely more excited & turned on with the pain & bruises… I started not wanting to cover them up & kinda showing them off. He also loves that I liked that he leaves his “marks” on me so he doesnt hold back. Now I’m to the point I’m asking him to bite me to leave bruises. My legs, tummy, and back get the worst. I try to keep them less visible if possible. I find myself staring at them afterwards & I get super turned on. I’ve been wearing hoodies to cover them up and long pants, but I just dont want to anymore? Yea, they are dark & decent in size but should I be ashamed? Is it wrong I like this?!
Do I care about others opinions & not how good I feel?
One more thing. I know this relationship isnt going to last. I started seeing him when he was split from his ex, now they got back together & he is still seeing me. I’m terrified I won’t have this good of sex again & no one will want to bite me hard & like he does. I know I’m helping him cheat but I LOVE this sex!