Okay, apart from STD's or infections, there is nothing wrong with semen or vaginal fluids... Any bacteria would be on the penis/vulva itself, no in the semen (if the individual is healthy) and that can be washed away with gentle baby soap/of Ph balanced cleanser and warm water. That's the REAL no moralistic answer, I feel you should know what it's all protein,glucose,sperm and contains about 5 calories/tsp
However, word of advice, as I bisexual myself, you should always use protection, no matter what kind of intercourse you are engaging in (anal, vaginal, anal). There is nothing wrong with experimenting but,please be responsible. Even in a commited relationship you should always, you and your partner monitor your sexual health at a minimum every 6 months.
Enjoy!