If we're basing revulsion based on cost of diseases spread, vaginal sex would also have to be considered disgusting. Actually, you'd have to view quite a lot of

If we're basing revulsion based on cost of diseases spread, vaginal sex would also have to be considered disgusting. Actually, you'd have to view quite a lot of non-sexual activities with revulsion as well based on that premise. Sorry, but I don't believe it's any more gross or decent than any other consensual sex act.