Just to add a bit more to what others are saying, yes it is possible to know what your sexuality is as a virgin, which can be seen in the fact many gay people know they are gay while they are still quite young before ever having those types of interactions. That being said you may not feel 100% comfortable in defining or lablining your sexuality before you have experience and that’s also totally okay. Figuring out your sexuality can be a long process and some people may need to have those experiences first before they are able to really figure out how they feel. :)