The preaching is good news and a warning. Believers often refer to it as a message of grace and wrath. Our testimonies are about spiritual evidence of lives changed by Jesus Christ for purposes of consideration by nonbelievers. You aren't following the believer, you're following Christ.
For some folks any mention of Jesus, the bible, scripture, church, etc....is "preaching". When most folks tell me things like this (nicely) they're basically saying "shut up" LOL. Sorry, I'm more direct these days.
God can deliver men from sins and change your mind completely about sin so that we no longer walk in willful sin and our consciences remain clear. We're to take every word and thought captive and it's possible with the Holy Spirit. If a woman bends over I often look away. If I see an attractive woman I take any potential lust captive...sometimes I pray about it. I devout my sex life to my wife...that simply really. The argument that we're innately sexual and need to satisfy those desires is intertwined with our sinful natures. There's a time and place for sex, but giving into every sexual thought and whim is not God's way.
We speak on these things so those that want to know more or align themselves with God have the opportunity. The VAST majority of the time the only folks speaking are the atheists. Most want to belittle, challenge and thwart believers and make us feel small.....sometimes they're successful.
Your simile that someone who tells you that they are not interested in your "message" is tantamount to telling you to shut up is somewhat accurate. My Parents taught me that saying "shut up" to someone is rude, therefore I try to avoid this term. So when someone representing a religious group knocks on my door to deliver they're message, I politely tell them that I am not interested. Anyone who "spreads the word" is essentially preaching. This is what missionaries do. When they say to me that their way is the only way, I find this extremely offensive. It is like they are calling me stupid, which is also rude.
Just so you know, if you were not innately sexual, you could not honestly devote your sex life to your wife. When your wife "bends over" or otherwise presents herself to you in an invitational manner, do you look away shunning any lust you might feel for her? Hopefully you do not.
I can say with a very clear conscience that I have no interest in belittling you or making you feel small, as you put it. If I want to hear your message, let me seek you out, don't just assume that I am interested or that I am a sinner for believing differently than you. When you do this, you belittle me. Let me just say that I am happy that you have found your way. This doesn't mean I accept that your beliefs are the only valid ones.
There are twelve classical world religions—those religions most often included in history of world religion surveys and studied in world religions classes: Baha'i, Buddhism, Christianity, Confucianism, Hinduism, Islam, Jainism, Judaism, Shinto, Sikhism, Taoism, and Zoroastrianism. Many of those who believe in each of these religions are as faithful to their doctrines as you are to yours.