Matthew 8:3ἥψατο
Jesus reached out His hand and touched the man. “I am willing,” He said. “Be clean!” And immediately his leprosy was cleansed.
Mark 5:27ἥψατο
When the woman heard about Jesus, she came up through the crowd behind Him and touched His cloak.
Luke 5:13ἥψατο
Jesus reached out His hand and touched the man. “I am willing,” He said. “Be clean!” And immediately the leprosy left him.
John 20:17ἅπτου
“Do not cling to Me,” Jesus said, “for I have not yet ascended to the Father. But go and tell My brothers, ‘I am ascending to My Father and your Father, to My God and your God.’”
Acts 28:2ἅψαντες
The islanders showed us extraordinary kindness. They kindled a fire and welcomed all of us because it was raining and cold.
1 Corinthians 7:1ἅπτεσθαι
Now for the matters you wrote about: It is good to abstain from sexual relations.

Abbott-Smith

ἅπτω
[in LXX chiefly for נָגַע ;]
prop., to fasten to; hence, of fire, to kindle, light: Luk.8:16 11:33 15:8, Act.28:2. Mid., with genitive, to fasten oneself to, cling to, lay hold of (so in π.; MM, see word): Mat.8:3, 15, Jhn.20:17, al.; of carnal intercourse, 1Co.7:1; with reference to levitical and ceremonial prohibitions, 2Co.6:17, Col.2:21; of hostile action, 1Jn.5:18 (cf. ἀν-, καθ-, περι- άπτω)
SYN.: θιγγάνω, ψηλαφάω. ἅ. is the stronger, θ., to touch, the lighter term. ψ. is to feel, as in search of something (Tr., Syn., § xvii; Lft., Col., 201 f.)
(AS)

Sources: Abbott-Smith’s Manual Greek Lexicon of the New Testament (1922, public domain) and glosses from STEPBible TBESG (CC BY 4.0); STEPBible TAGNT (Greek New Testament, CC BY 4.0); the Berean Standard Bible (public domain). Reformatted by Word Study, wording unchanged. All sources and licenses.