My boyfriend's sweet talk with me is always related to Xing, for example, he wants to save me and his little brother misses me. Does this mean that he just took a kidney?

This is not necessarily true. Young people are full of energy, and it is normal to always think about that. You can't say that your boyfriend doesn't love you because of this. Many times, sex and love are inseparable.

Moreover, many boys actually like to tell some colorful jokes.

Therefore, to judge whether a boyfriend loves you or not, we should consider it from many aspects and not be so arbitrary.