Is it sick to have sex with two men within a week?

Patient's question:

I'm feeling very complicated right now. I already have a boyfriend, and we've been together for many years. He's been very good to me, and we have had sexual relations. However, this month, I met another guy who is very kind to me and keeps pursuing me, even knowing that I have a boyfriend. He has moved me deeply. I'm unsure which one to choose. Regarding my current boyfriend, I can't let go of him; I feel guilty, thinking it wouldn't be right to break up after being together for so many years—it would be too hard to let go. As for this new guy, I really like him. He's been too good to me, and I'm currently in the phase of being. This week, my ex-boyfriend asked me to have ML with him, and I don't know how to refuse, because

Doctor's answer:

Whether you will get sick depends on whether your sexual partner has a sexually transmitted disease. As for choosing who to be your boyfriend, it depends on your own decision, and others can't decide for you. It depends on who you love more and what your personal standards for choosing a partner are.