Getting over his sexual past

Im 29 and have only had sex with my husband and im the only person he has had sex with. We have been together for 10 years and are divorcing. When thinking about future relationships i have a major problem with the sexual side of things. I dont understand how people can be ok having sex with someone whos been with other people....to me thats just gross....i know it would be my only option if i ever did try again but i really really dont know how to get past that. Its not a jealousy issue its just a physically disgusted issue. Like having somthing inside me thats been in multiple other people makes me sick...i know im wierd and its stupid but i really dont know what to do other than never have sex again.